... around the house. First time I smelled it I thought one of the cats had an "accident." Nope, they're all using their litterboxes like good little kitties. Well, the latest incident happened this afternoon and the two boys were in the basement, so I have to conclude that Mellie is the culprit. My Mellie is passing gas!! So, my question is, and honest, it's really a serious question: are there any health conditions that might cause a cat to fart? Googling keywords for this topic is likely to bring up an awful lot of irrelevant hits to sift through, so I hope some of the good members here can answer that.