Ok so around the middle of March, one of my 4 cats, BlackBerry, starting having diarrhea with blood in it. She pooped once a day, and it was either completely diarrhea or a mixture of regular poop with soft poop, and it always had blood. She would poop and then she would be straining a lot and making little noises, like it was hurting her to poop, and she would push for a long time and no more poop would come out, just blood. We took her to the vet after about a week of this, and she said it was probably worms and she told us to send in a stool sample and they would test it. So we did, and it came back negative for worms or anything. She said we could still give her the worming medication anyways, but we said we would just wait and see. That was March 29. BlackBerry has continued to have soft poop with blood every day. Now, the last couple days 2 of my other cats, Booger and Pennywise have soft poop with blood. So that's 3 of my 4 cats that have it. When we took BlackBerry to the vet, she said that if it was worms, then if one cat has it then they probably all do, and so now my Mom wants to get the worming medication for all the cats. BUT I'm not sure if it's a good idea to get them dewormed when we're not even sure that they have worms. I just don't understand what is causing this if it's not worms though. Back in October for a couple of weeks all four cats had the same thing, soft poop with blood. We never took them to the vet and it just kind of stopped. Once in a while, one of the cats would have soft poop but there was never blood again until now. So I'm very confused to what it could be. I don't know if it's their food or something else? Should we just get them dewormed anyways? If anyone could help that would be very appreciated!