I have two buns. One neutered male, pet store wasn't sure how old so 6-10 months old. We have had him a few months. A female we just rescued today which isn't fixed and I would assume would be 6 months old. We are slowly trying to introduce them to eachother. The female will be fixed next week. The male will not primarily use his litterbox. We have been doing every technique we have read. Tips please on training them both please and tips on bonding please. We would like them both to be able to free roam the house if possible. I hate that they spend so much time in their cages. Thank you. I should add that the male is very aggressive towards our cat, and we will be starting water bottle training with him and the cat tomorrow.