I haven't posted in a while. Still need advice on my male Siamese's loose stool and gas. Sebastian has seen a Vet specialist and been treated for giardia and other parasites. I'm fairly confident that he is now parasite free. His prescription diet is Royal Canin Hypoallergenic Rabbit and Potato. Still, he has loose stool. He seems to go thru stages of constipation, loose stool and diarrhea, but mostly loose stool and gas. The Vet wants to do a ultrasound. I can't continue dropping $300 to $500 on a shelter kitty. I'm assuming Sebastian has IBD. The vet suspects a lower GI issue. Sebastian fasted for 24 hours. I then gave him pumpkin with Duck & Green Pea (grain free) diet. BTW, I switched him to Duck & Pea last week over a 3 days. Too early to know if this will help. Any other advice or ideas? I'm thinking maybe a Probiotic next if this doesn't work.