Hi Tracey, Shih tzu are known for stomach problems, especially pancreatitis, try a diet that is lower in fat, spewing yellow acid is a sign that she has excess stomach acid, are you sure she doesnt have acid reflux, my boy was suffering from this the begining of the year, I had to cook boiled chicken breast & boiled pumkin & also he was put on 1/3 Zantac every 12 hours 1 hour before food, this fixed the problem, as he hasnt vomited now for months thank- God, also kibbles are processed & harder on their tummy to digest.. You dont say what she is eating change whatever it is she eating, so she wants to eat & smaller meals are best 4 times a day, not the 1 big meal a day, as the acids will eat away at her stomach & will cause stomach ulcers in the end, a nice low fat dry biscuits helps..for her not to want to eat something is wrong, change her diet to a lower fat easy to digest meals & see then if she’s feeling better…nice smelling tuna or salmon as a small meal, I do the tuna & boiled pumkin for a light breakfast as Patch cant stomach his kibble for breakfast, I give the kibble for lunch & dinner but he’s on a low residue kibble that breaks up very easy & now Im adding the Wellness Simple Duck & Oatmeal, but the Holistic Select kibbles broke down easier & when water was added the Holistic Select soften real easy so he’d digest it easier then a kibble that had potatos..
