Oh poor poor Lucas, i know how he feels, also an IBS sufferer, however can you clarify one thing Jen does he have Irritable Bowel Syndrome or Irritable Bowel Disease, i believe they are different, i remember my sisters kitty being diagnosed with IBD, I really have no advice only empathy for Lucas and you, I have never found anything that cures or really helps IBS, stress is a factor for sure in humans, so could be in kitties too, Aloe vera is supposed to help, but i have not noticed any changes, so maybe it works for some and not others, but i imagine you can try treating it with natural alternatives the same as with humans, it can i believe turn into ulcerative colitis in humans, so might be worth a mention to the vet, i sure hope you can get some relief for kitty. Good Luck.