Hi, my sisters rabbit has the same problem that started recently. He is a little over a year, and a minilop rex mix, he hasn't been getting ANY veggies since it started, he eats the rabbit pellets and yogies, but we stopped giving him yogies(1-2 a day is what we had been giving him) it his getting very painful for him, we have been trying to get the poop that is matted with his fur almost every day, but it keeps getting worse. The poor rabbit doesn't like it much at all, please help!
also I forgot to put that he to has an unlimited amount of hay, and gets plenty of water.