Hey guys, so the other day while I was cleaning out Ashers and Vash's litter box, (2 young male rabbits) I finished emptying the litter and there was a bunch of dark orenge almost red urine goo in the bottom, I had just cleaned the litter box 2 days before. It was almost as though the urine had caramelized. is this normal? I have them eating timothy hey along with rabit pellets, and they have fresh water in a water bottle every 2 days, and thier litter is corn cob. I am just wondering if something is wrong with them because I know rabbits can have urine problems.