I have a dwarf rabbit about 4 yearsold. My children found him in the park three yearsago. He has become my baby. What apersonality. He was fully litter trained (what a surprise tous - didn't know this was possible). We have since lethimrun the house. For this time he did wonderfulwith using his box. Recently my sister came to visit - withher dog - and I did not know how sensitive rabbits could be to thischange. She was here for only a half hour. Sincethen, we have had lots of aggression from him - I have been bitbut he also has bit my large dog. It had been funnyto see this big animal soooo afraid of this little thing. Wehave gotten through lots of his behaviours since then but cannot gethim back to using his box to pee in. Just had his urinetested thinking he had an infection and it is just fine the vetsaid.How do I go back and deal with this. He has gone fromrunning the house to being locked up in a small space. Hehates it and so do I but I cannot let him run and pee.