Hello! I have a Holland lop and when he was younger, he would never eat his cecotropes (the product of the cecum, a part of the digestive system in mammals of the order lagomorpha, which includes two families: Leporidae, and Ochotonidae). If it is cecotropes, they should stink really bad and stick together (kinda like diarrhea). Anyway, my bun had got it all over his butt, feet, and cage. I took him to the vet for some allergie issues and asked the vet about his poopy butt, and she said, “He will grow out of it and I can’t do anything.” So I had just clean his cage and wipe his butt every morning and evening for like 2 months, then he started to eat them. Rabbit poop is not runny and are in ball forms (of course you know that). So next time he has it on his butt, smell it and if it stinks, it’s cecotropes that he isn’t eating. I would try using old bedding or something you can throw away.

I had accidently sent my answer twice due to bad internet where I’m at, sorry ??