Q. My sister has a 6 week old pup,who lately has had a hard time holding down her food.she will nurse and the puke and it comes threw her nose.
A. I recommend getting her seen by the vet as soon as possible. At six weeks she should be well onto solid foods but may have a gastrointestinal virus or infection that makes it difficult for her hold food down, additionally, if she has aspirated any of the food she vomited, she could also have pneumonia. It may be a case of her eating too fast for her stomach to take it all in, but it's well worth getting her checked to be on the safe side.