
My vet told me regularily bringing up bile ie each morning can normally mean dogs food is irritating the stomach , this happened to one of mine recently , she has been on same food for years but bringing up bile every morning which I knew wasnt right as tried the bis before bed etc etc:
He changed her food to RC sensitive for a week and within 2 days she was fine, he then said I could try any food I wish after that but not my regular one, she is now on Wafcol salmon and potato . He said this can happen even when a dog has been on same food for years with no problem .Shes happy , I'm happy so I would suggest you try a different food.
Also because of her age I would also get her a check up just to be safe.
As for zantac I have heard this used before but my vet who is as i have mentioned before into natural remedies ,rarely medicates , told me zantac is commonly used but to him is a definite no no he prefers to cure the problem rather than mask it.
Roni