My Golden retriever has had a few episodes recently where in the middle of the night, first thing in the morning or late afternoon (so all when her stomach is empty), has vomited a frothy bile substance. She is eating normally, her stool is normal, normal water intake, energy is fine.
The only thing that I can think of that might be causing this: bully sticks. But, I have been giving her bully sticks for months, so I don't know why all of a sudden she would not be able to tolerate them.
Any ideas?
Chrisy