Why Is My Dog Always Hungry? Common Causes and When To Call Your Vet

If you’re wondering, “Why is my dog always hungry?” the cause could be anything from learned behavior or stress to an underlying health condition such as diabetes or Cushing’s disease.  

If your dog suddenly seems hungrier than usual—especially with weight, thirst, or bathroom changes—schedule a visit with your veterinarian. 

Why Is Your Dog Always Hungry?

There’s no clear-cut cause for why a dog might be obsessed with eating.  

It could stem from a psychological issue, such as stress or learned behavior, or a medical issue, such as not getting the right nutrients or an underlying health condition. 

Common causes on an increased appetite in dogs include: 

• Psychological issues, such as anxiety or stress 
• Learned behavior, due to poor nutrition (either fed too much or too little) 
• Aging process (as dogs age, some will begin to crave food more) 
• Medication, such as prednisone 
• Metabolic disorders, such as diabetes mellitus and hypoglycemia 
• Cushing’s disease (hyperadrenocorticism) 
• Gastrointestinal disorders that interfere with nutrient absorption, which can include: 
• • Inflammatory bowel syndrome 
  • Cancer 
  • Exocrine pancreatic insufficiency 
• Parasites or infections that interfere with nutrient absorption 

How Vets Diagnose the Underlying Cause of Increased Appetite in Dogs

In addition to taking a complete medical history and performing a physical exam, your vet may want to run a range of tests to determine the underlying cause for your dog’s sudden increase in appetite.  

These texts include: 

• Blood work  
• Urinalysis 
• Tests for parasites like Giardia, such as fecal flotation or fecal smear 
• Adrenocorticotropic hormone (ACTH) stimulation test or low-dose dexamethasone suppression test (LDDS) to check for Cushing’s disease 
• Imaging tests, such as ultrasound 
• Serum trypsin-like immunoreactivity test (TLI) to check for exocrine pancreatic insufficiency 
• Endoscopy 

Treatment of Increased Appetite in Dogs

Treatment for increased appetite in dogs will depend on the underlying cause: 

• Behavioral-related causes may be addressed by feeding smaller portions more frequently and carefully supervising your dog’s food consumption. 
• A metabolic issue, such as diabetes mellitus, may be treated with daily insulin injections and dietary changes. 

• If Cushing’s disease is diagnosed, medication called trilostane may be prescribed. 

• Infection or parasites will be treated with medication and/or deworming, such as pyrantel pamoate or fenbendazole. 

• For exocrine pancreatic insufficiency, your vet will recommend dietary changes and medications, such as a low-fat diet (like Royal Canin Veterinary Diet Adult Gastrointestinal Low Fat dog food) and digestive enzymes (such as PancrePlus Powder). 

• Treatment for cancer can include chemotherapy, surgery, and radiation treatments. 

Prevention of Increased Appetite in Dogs

Some instances of increased appetite in dogs are not preventable, such as normal aging changes or development of a health condition.  

However, pet parents can take the following steps to support a healthy appetite:  

• Feed a high-quality diet at consistent mealtimes each day to support good nutrition. 
• Ensure your dog receives regular veterinary care to identify health concerns early.  
• Keep your dog on year-round parasite prevention to protect against intestinal parasites. 
• Keep home routines consistent and predictable to reduce stress and anxiety.