15 wk. puppy vomits bile not food

Question
Why does our puppy vomit bile during the night and late afternoon?

Answer
Allison,

Bile is vomited when the stomach is empty.  I have seen several dogs vomit at night and mornings due to a high level of acidity in the stomach.  Although, that is just one of so many many reasons for a dog or puppy to vomit.  I recommend you take your puppy to the veterinarian for a physical examination and testing.  That way you can hopefully get a professional to diagnose why your puppy is vomiting and can treat it appropriately.

Good Luck to you both