It seems both mine have colitis from some kind of virus. I nipped to the vet with Baira because of the runny poop and blood and the vet said it was probably something she ate but if it continues to bring her back. At 4.30 this morning Leos was screaming his head off and when I let him out the world fell out of his bottom. When he went again this morning he left drops of fresh red blood. Even to me it's abviously some contagious virus that they both have/had. Vet will give me some prebiotics to give them both for a few days and i'm to keep them on a bland diet for a day or 2. If it contines for them he will give them antibiotics, although i'm hoping they'll be OK seeing as Baira has been fine all week.