I've just realised he's been a free range bunny for 2 years, not 1 as I said in last post. Yes, he was neutered before he came to us, and has no underlying medical problems..all in all a very active bunny with a healthy appetite. His behaviour's still the same..very inquisitive and friendly. Nothing has been changed in his environment recently. Leanne's duo came to stay for a week..they were in a temporary run in the kitchen extension, but Dougal never goes in there as he doesn't like walking on shiny floors , and the weeing problem started at least a month ago. I wonder if it's because he regards the whole lounge as his territory.... I know that retraining him to the litter tray may entail confining him, but he's not used to any sort of confinement and am worried that he may get stressed.