i was priveledged to have two mini-lops,.they-now- are both deceased,,one not both had this poopy butt syndrome,requireing at least weekly,bottom cleaning(small bath).,she was about 5 yr,s when she passed,./they had a diet-consisting of/.70%fiber,ie..timothy/orchard grass,.and low fat pellet,-1 oz.per#of bun,..small amount of dandylions,clover,grasses,,numerous exotic specialist visits,/.you can have a diet problem,and should have testing done to ensure there are no worms,parasites(gi-tract),.they were sisters saved from a pet store/they were in cedar shaving from birth (which in itself kills rabbits).-the second one died a short while ago at age 6 and half years-i miss them-,/.this is why i have a rehab,.and try to give them a good life,..sincerely james waller