my dee dee gets like this when she goes to the vet
and sometimes she will vomit - so sad - it is hit and miss though
first you want to do fecal but if you have done that and it is stress related and happens each time then i would do the pumpkin with probiotics mixed together 30 min before food twice a day
i use dds plus from vitamin shoppe and have for 2 plus years as it is non-dairy