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Dr. Coates is a veterinarian based in the other “Sunshine State” – that's Colorado to the rest of you – where she lives and plays with a varied range of animals. She shares her professional and personal experiences, Monday through Friday, here on petMD's blog, the Fully Vetted. Log in for your daily dose of her insight and wisdom.

 

How cold is too cold for animals? On temp standards and flying pets in cold weather

December 26, 2009 / (29) comments


I live in Miami and only rarely venture into colder climes with my pets in tow. Consequently, I have little first-hand knowledge of cold weather issues. Yet I’m constantly asked about them with respect to travel. As in, how cold is too cold? How long can my dog or cat withstand low temps in cargo? At what point is it inhumane to allow a pet to fly?

 

This issue came up for me (again) a couple of days ago while reading the acclimation statement on the health certificate attached to the kitten described in my Christmas Eve post.

 

So you know, airlines typically require a certificate or statement of “acclimation” whenever an animal is flown. Airlines require this so that animals may be shipped in accordance with veterinary recommendations, effectively restricting their liability with respect to temperature in the event of animal illness or death.

 

In this shipped kitten’s case, the certificate read as follows: “...35 to 85 degrees.” It did not specify Celsius or Fahrenheit. (It might’ve been in Kelvin or Rankine for all we know.) Neither did it specify a time frame. I mean, how long is too long?

 

For heat, we know that once you reach certain easily-achieved high temperatures (as in a hot car), animals cannot live beyond a few minutes. This is universally true for all. Yet when it comes to the lower end of the scale, a lot depends on the animals’ weight, conformation and length of the exposure.

 

Sitting on the tarmac for three hours? No 1.5-pound kitten should suffer 35 degree temps (Fahrenheit) for this length of time. He’ll almost always survive, but the experience gets filed under cruelty, nonetheless. Common sense dictates that much.

 

But apart from experiencing it first-hand and agreeing roundly that a bad time would be had by all in similar circumstances, how would we really know? Who’s to say whether one cat’s near-freezing is another dog’s ideal temperature? And how does the time of exposure factor into it (yet another level of vagary we’d be remiss to neglect)?

 

Thankfully, modern veterinary medicine has gone out of its way to establish guidelines for this. Not only does the USDA issue basic standards (under USDA Transportation Standards 9CFR 3.18 which state that “ambient temperatures in airport holding facility must not dip below 45 degrees or above 85 degrees for over 4 hours [for dogs]”) but Tufts University’s vet school has also made inroads into this issue (at least for dogs).

 

According to the so-called, “Tufts Animal Care and Condition Scale,” weather safety is calculated according to the following graph's acceptable standards:

 

 

Tufts says, “Read score off diagonal bars, by dog size: To determine score, draw a line up from the current temperature and parallel to the dotted lines, and read score on bars [for which 5 is an ideal dog and 1 is an emaciated, poor-conditioned dog]." Additional tweaks to the scale are offered in the accompanying verbiage, being sure to add, “Common sense must be used to take into account the duration of exposure to any given temperature when assessing risk; even brief periods of high heat can be very dangerous, whereas a similar duration of exposure to cold temperatures would not be life-threatening.”

 

But "common sense" is not always so common, right? Yes, even Tufts shirks the length of exposure issue. But luckily, the USDA's 4-hour standard can be reasonably applied to help define the specs.

 

This may all sound pretty basic to you. Yes, it should be obviously commonsensical that dogs and cats shouldn’t have to suffer certain degrees of frigid temps. Nevertheless, this is crucial stuff for veterinarians like me who have to rely on evidence-based standards––not experience-influenced determinations––to make recommendations for animal welfare in legal and regulatory settings.

 

It happens more often than you might think. As in this actual legal case: Is a low body-fat sighthound OK tethered out in 20 to 30 degree weather for 3 hours a day? Or when it comes to cases like my kitten's: Is it OK to issue blanket statements about the temp a 1.5-pound 8-weeker can theoretically experience without specifying a timeframe?

 

You think about it.

 

 

Image: Keramm / via Flickr

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COMMENTS (29)
1
by on 12/29/2009 06:59pm

"I daresay some of us stress more than animals do in airport transport situations"  I do; I do.  Loved to fly as a kid.  Going into LaGuardia back when you could listen to your pilot on (free) head phones talking to ATC and looking out the window while circling, dropping through the holding pattern; I saw a plane pass us circling in the other direction.  We suddenly lurched up and I heard our pilot calmly say: "Control, what was that wide body off my wingtip?"  Control was silent for several seconds and then instructed a climb of 500 feet (half a level).  Our pilot confirmed already at that level.


It was years later before I found out there's a standard procedure executed during these near misses, including that one plane goes up a half level and one goes down and they do it automatically depending on which way they are circling which is why evey other plane circles in holding right and the others left.


And that isn't even the incident that made me afraid to fly :)

2
by on 12/29/2009 01:00pm

I can't understand flying pets in cargo. I simply won't do it - if potential owners can't pick their puppy up in person, then they're not getting a puppy from us. I need to meet the new owners in person, and I need to see them make that degree of comittment to their new family members. 


I compare it to babies - if you wouldn't stick your 3 month old baby in a cargo hold, why would you put your puppy there?

3
by on 12/29/2009 12:05pm

The cabin is just fine. Sure, we'd rather not stress any animal but I daresay some of us stress more than animals do in airport transport situations. After all, fear of flying can be extreme for some humans. But we all make do when we have to. And I find that most pets travel much better than my clients expect them to. 

4
by on 12/29/2009 11:48am

Thanks PJB.  It was stressful even in the cabin, but it was the only way.

5
by on 12/29/2009 09:20am

Dr. K, Sorry, know that's the way it's portrayed in the media and just know there's always someone who grieves too.*  And, I oh so agree it is a miracle there aren't more.


*Every time an elder pet is up for adoption and hits one of the lists I'm on, someone says "I can't imagine any circumstances that would make me give up a pet."  It always hits a chord with me because I can.  This topic generally hits a similar chord.


Stefani, I think we were talking about shipping them cargo rather than accompanied in coach :)

6
by on 12/29/2009 08:52am

Is it ALWAYS numbskully to transport kittens, even if they are in the cabin with you?  Even if transporting them is the only way to save them?


The cats that I have that I rescued from a colony in Italy (two I adopted out, two I kept) obviously were transported here to the US on a plane.  In the cabin, with me.  The only time I ever got to fly business class, thanks to my company.  Sabena air.  The stewardesses were charmed by the fact that kittens were on the plane and offered me anything to help. 


It was horribly stressful for the wee ones (about 8 weeks old) and they already were just fighting off URIs, so the minute I got home I had to rush one of them to the ER -- dehydration from the flight and stress had caused a flare up of the disease.


All the same, all four survived, all four got good homes, otherwise at LEAST three of them would have died within a week or two on the streets, and the only one healthy enough to probably make it through kittenhood would have had the life of a sickly street cat on the truly mean streets of Naples.  It was the only way  . . . .


Personally, I could never "order a pet on the internet."  The whole thing,  seems sketchy and a little irresponsible to me.  Besides, I just would not feel right about the animal being unattended in cargo, not knowing what it might be subjected to.  If I had my heart set on a dog or cat from a breeder, I would try to arrange a caravan.   Fortunately, I like my cats unpedigreed.    The ones I have from streetcat stock are my smartest cats, and I don't think it's by coincidence.

7
by on 12/29/2009 08:15am

PJB: Consider me chastised. A handful is way too many. But considering the numbskulls willing to fly baby kittens cross-country, it's a miracle more don't succumb. 

8
by on 12/28/2009 09:54pm

"only a "handful" of pets die in plane trips"  That's a handful too many if one of mine is in there.  Besides, they never want to cough up the details of how it happened!

9
by on 12/28/2009 09:48pm

"Cargo areas are temperature and pressure controlled"  Nope.  Most modern civilian planes are equipped for it but it is done per the airlines SOPs and at pilot option.  Pressurizing is more common than temperature control.  Most cargo holds run temp from 30-70 degrees F during flight so are more often equipped with heating capability (same rules as pressurizing, SOP and pilot option) but rarely with A/C.  If you're stuck on the tarmac for 3 hours, the heat can be extraordinary in a cargo hold, especially if the plane was on the ground for a while before being loaded.  Heat is usually to 45 degrees F and pressurization is often nominal.  If the pilot encounters power losses, these will be at the top of his/her list of places to steal power from.  Many aircraft have multiple cargo holds and pressurization and temperature control is set for them individually to save energy, fuel and costs.  There have been accidents involving cargo placed in the incorrect cargo hold although those have been reduced over the years.


Find pilots who are in training and need flight hours.  Their puddle jumpers will take longer to get you there but you can have your critters up top and what you pay them defrays their cost for getting needed flight time.


Mine are either going to be in the seats adjacent to me or ditto in my vehicle. Then I know what pressures and temps they're being subjected to.

10
by on 12/28/2009 09:32pm

My mom's been feeding a feral, or perhaps semi-feral, up here in the DC area for over a year.  After all this time, he will let her get close enough to scratch his head a bit while he's eating, but any rapid movements and he bolts. He will not come in, and he disappears if other humans are around.


You are probably aware that before Christmas DC got 16 inches of snow dumped.  The cat, who my mom calls "The Grey Ghost," was not to be seen.  Anywhere.  She was sure he was dead.


Lousy timing, since I'd bought her a Feral Villa as a Christmas gift.


All is well . . . for now.  He showed up on Christmas Eve.  However, he shows no interest in entering his insulated Feral Villa and we are already dipping into the 20s here . . .

11
by on 12/28/2009 09:02pm

Patricia: I can't understand why your approach isn't considered the norm. A family member you'll live with for the next 15 years deserves no less...IMO. 

12
by on 12/28/2009 09:01pm

Linda H: I agree. The new 3-hour times are a boon to us pet people. The important thing to know is this: Unless you're waiting on the tarmac for long times, temps are not a problem since the cargo hold is temp controlled for almost all airlines. For airlines who consider themselves "pet friendly," their cargo holds are also heated/cooled while the plane is on the tarmac. The efficiency of this heating/cooling, however, may not be up to human standards, though.


It bears mentioning, however, that only a "handful" of pets die in plane trips in the US (according to surveyed carriers in an Associated Press study from 2008). It's also worth noting that carriers will tell you if their cargo areas are cooled or heated during tarmac waits. Still, I'd worry mightily about poor body conditioned and very young, old or sick pets. 

13
by on 12/28/2009 08:53pm

I have a friend on the east coast that just purchased a Sealyham from Australia. It was last Spring, the 4 1/2 mo. puppy flew into LAX, which she flew out to meet the pup and have her under the seat for the rest of the flights back east.


I did not want to even ask how much all the plane fare cost, but probably far more than the puppy!

14
by on 12/28/2009 07:15pm

I bought a Tibetan Spaniel off the internet.  I made sure the breeder was a member of the TSCA and I got references from those people.  I also talked to the breeder a lot before I made the purchase.  She was uncomfortable letting the dog go North in December because of the weather, and I was not comfortable shipping the dog in cargo.  So I got the dog in the middle of January, still cold weather in the north.  Actually it was easy and only a bit more expensive to fly myself to Texas to meet the breeder and dog, and fly back on the same day with the dog beneath the seat in a Sherpa bag. That way if anything happened on the flight with weather, the dog was with me and I could attend to the dog.  To me this was the most humane way to get my dog.

15
by on 12/28/2009 02:32pm

Cargo areas are temperature and pressure controlled when flying. If they wren't they would never allow an animal to travel in cargo since the temperature at the height planes fly is extremely cold and the air is lacking in oxygen. It's the wait on the tarmac that can be dangerous in the cases where planes get delayed for hours. The new rules that give big fines for waits over three hours will help.


I've always been more concerned about high temperatures than low ones. A mostly solid crate (as they must be for shipping) with good bedding will allow an animal to burrow down and curl up for heat retention, if necessary.


I've always been surprised at how well my dogs (50 lbs and lean) handle cold temperatures. It's getting down near freezing now at night and even my old guy with the sparse coat doesn't want to come in from the yard (in the summer he only wants to go out to do his business). Inside at night it is mid-50's (colder near the floor) and they still sleep sprawled out. The only difference is they sleep on the rugs, not the bare floor but they still only rarely seek out the beds provided.

16
by on 12/28/2009 01:27pm

Dr. K., were you able to impress, at all, on the owners of that kitten, that any cat, let alone a single 8 wk old baby, is going to be scared crapless by flying and the temp problems certainly won't help?  Or did they not see anything wrong with the whole concept because they've done it before and the breeder(s) think it's perfectly normal to scare their products in transit?


With the new idiotic regulations from TSA that are sure to come after this incident on Christmas, I'd bet no animals, even little ones, will be allowed to fly as carry-ons really soon.  Hmmm, are Amtrac freight cars temperature controlled? 


As others have said, I would never have a pet fly in cargo, and I highly doubt I'll fly anywhere ever again.  Unless I have the $$$ to charter a private plane and get around the TSA's ideas of sensible (HA!) security regulations.

17
by on 12/28/2009 12:26pm

Gotta go with Sonya on this one.  A pet is a member of the family, and a member of my family isn't "cargo" regardless of temperature.

18
by on 12/28/2009 10:07am

I could never fly an animal in cargo.  Ever.  I would drive or not go.

19
by on 12/28/2009 09:59am

I agree that heat is far worse. Which is why cold is such an insidious problem--so much harder to argue the point that x is too cold to be humane.


As to hot weather and pads the rule of thumb is this: If it's too hot for your feet it's too hot for your pet's. Period. 

20
by on 12/28/2009 07:35am

I myself don't tolerate heat or cold very well, so the furkids follow my lead. :O) If I'm too hot, they go out, do their business and I call them in. When it's cold, the younger ones get to play outside longer than the oldsters. Being shelties, they do like the cooler weather. This morning it was 18 degrees with a wind chill in the single digits - and I had three that wanted to race around outside and chase each other. Brrr! I brought the old ladies (12 and 106 at best estimate) in and let the young'uns run for 5 minutes. Then they got called in. Yeah - too cold for me, too cold for them!

21
by on 12/27/2009 06:52pm

Posey, I'm also in Dallas, and I have to tell you, my guys have been LOVING this weather. :P It probably depends on your individual dog's tolerance. Lizzie and Kaylee (German Spitz and Rough Collie) both are equipped with coats that were adapted to deal with a MUCH cooler climate.

22
by on 12/27/2009 04:58pm

Hi Posey


I have them out in temps of -10 celcius so I think your temps are likely not as cold. Depends on  their pads, I  trust that the hair on their paws and between their toes protects a bit. Extreme heat would be just as bad I think.  I still take them out as they need the exercise, but we don't walk for more than 45 minutes in extreme heat or cold.

23
by on 12/27/2009 04:03pm

I've wondered the same as Andrea about exposing their pads to extreme temperatures.  It doesn't often get frigidly cold in Dallas, but it does get extremely hot.  In the summer, I figure if I wouldn't run around barefoot, the dog probably shouldn't either.  It's the cold that's harder to gauge.  For example, we just had a Christmas "blizzard" (by Texas standards).  I haven't walked my dog since the 23rd because of the cold and ice, but now that it's thawing, I'm guessing it's okay during the day.  What about at night, though, when the temp drops?  Any thoughts?


Oh, and I can't find booties to fit her massive feet.  : )

24
by on 12/27/2009 01:53pm

I simply hope never to have to fly with my dogs in cargo. My boston (who is not a typical boston, in this rare case his puppy mill breeding - he's a shelter boy- benefits him. No pushed in face, no breathing problems, great heat tolerance) could only be snuck into the cabin by squishing him into a carrier designed for a smaller dog. My frenchie would fit under a seat, but would drive everyone nuts with his complaints.


There's Pet Airways now, and I might consider that, but honestly, for years now we've limited our options to either getting a trusted housesitter to care for the dogs, or driving with the dogs.

25
by on 12/27/2009 12:28pm

Having worked briefly for the FAA, I would simply never be able to put an animal in a cargo hold and I'm not a fan of flying either.

26
by on 12/27/2009 12:16pm

What about obese dogs?


I'd wager that a lot more obese dogs are shipped when it is too hot than emaciated dogs shipped when it is too cold.


I mean, seriously, who ships a dog with a body score of 1?


Same problem with brachycephalic dogs.

27
by on 12/27/2009 10:13am

I don't have cats at the moment but a small kitten in the hold of a airplane, I can't imagine that would be good.


My dog Riley, like Cindy's, would stay out in all kinds of weather. He's a Golden Retriever/Standard Poodle cross and his coat is heavy and quite dense. Our female is the cross but doesn't like the cold nearly as much.


My bigget worry is the pads of their feet in winter. I live in Canada and we get lots of snow and really cold temps. I love to walk the dogs but worry about the pads of their feet in the snow and ice. Since they have lots of hair on their feet, this stuff sticks like glue. Is there any recommendation as to how long you can have your dog out walking in winter before you are doing damage to their pads. They just won't tolerate booties - I don't blame them. Silly looking things.

28
by on 12/26/2009 11:27pm

My lord, I was worried about my own kittens in my bedroom when they first got home since I usually leave a window cracked a 1/2 inch to let some fresh air come through and it was a bit chilly at night.  I can't even imagine an 8 week old kitten all alone and cold in a cargo hold for any length of time.  (OK, just the idea of a kitten all alone makes me want to cry anyway.)  My kittens are big enough and smart enough now to have figured out if they're a bit cold at night, they can burrow under the covers and snuggle with me.  (And they happily do!)


And then you have my dog.  He thinks he is the wild dog of the north.  As best we can tell, he's a Tibetan Terrier mix and has a lovely thick coat, but trying to get him inside on a cold and windy day is like pulling teeth.  He would stay out on the deck for hours if I let him do it and not be the worse for wear.  There have been more than a few nights where I have been chasing him about the backyard after we supposedly "agreed" that it was his last trip out and it would be a quickie.


There are just so many variables involved, I can see how it would be incredibly difficult to say with any certaintly what temps an animal can be content in and for how long.

29
by on 12/26/2009 11:05pm

EEEKK! Eight week , less than 2 lb. kitten shipped in cargo? Was it on an airline with controlled temperature section of the hold?


Weather exposure has to be tied to common sense. I don't let my elderly dogs stay out as long as the same weight younger dogs, Baby animals? Same as elderly!

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About fully vetted

Patty Khuly, VMD, MBA

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Dr. Khuly is a former petMD blogger and small animal veterinarian in Miami, Florida, where she practices medicine at Sunset Animal Clinic and serves on the board of the South Florida Veterinary Medical Association. She is a graduate of Wellesley College, the University of Pennsylvania School of Veterinary Medicine, and The Wharton School of Business.

As a significant sideline, she writes...a lot. She authors pet health columns for USA Today, The Miami Herald and Vetstreet. She also writes a popular monthly column for Veterinary Practice News and serves as regular contributor to Veterinary Economics, The Bark, and the Veterinary News Network.

Dr. Khuly lives in South Miami with her brood of hens, goats, dogs, cats...and humans.

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