Hello! I am asking for some advice from fellow cat lovers out there regarding cat bathroom issues. My (almost ten) cat has had diarrhea for months now. The stools are NOT extremely soft and formed into the right shape, but still sort of soft, and have a very bad smell. My vet did tests for diabetes, kidney function, and thyroid and everything was really good except elevated protein level in blood or urine. He was tested again this February and everything is about the same. My vet put him on Royal Canin gastrointestinal diet (both soft and hard food) in Dec.2015 and gave him antibiotics for a week to stop the diarrhea. Although it wasn't a total cure it helped improve the hardness of the stools some. He has been drinking more water, the vet says, cause he is trying to make up for water lost in the stools. It could be possible that someone in my family is feeding him something he shouldn't have, human food or milk. Of course, I told family more than once not to give him anything different but maybe they're not listening to me. I don't know what else the problem could be! Vet told me that a feces or blood test cannot determine if cat has had milk or not. The vet also said that he was put on a diet with lots of carbs because high protein could cause or worsen his diarrhea. Everything I've been reading about on what cats naturally eat goes against the high carb diet the vet recommended and it seems to me a high carb diet would cause diarreha or worsen it, but definitely not cure it. I think why he got the runs in the first place was because I was spoiling him with too many different kinds of treats and a new kind of canned food. I'm scared to start switching his diet cause he might get worse. I started him on the recommended dosage of lysine a few weeks ago and I don't think it's making him any worse. Does anyone know about the kind of stools a cat would produce if having milk? Could worms be causing this? He hasn't been dewormed. What food would help stop the runs? What does a high protein level mean in a cat and is that why he should stay on low protein diet? Please, if anyone has some advice or experience with this could you please send some helpful info. my way. Thank you