It may be the food. My cat Akira of 1 year has a sensitive stomach and cant tolarate certain foods. at frist he's fine but after a few meals his stool gets loose. i spent monthes looking for new foods he could try. His stomavh issue was because he was abandoned at 1 week so he didnt get breast feed.
His name is Chaos ♡ and he got a little brother or sister im not sure what she is. Chaos is the one with the white spot and his playmate is all black. ♡