Q. have a male rabbit non neutered likes to run and spray urine everywhere have other male next to n separate cage cant see eachother still sprays why
DR. ANDREA M. BRODIE, DVM
A. This is normal territorial behavior. Neutering both rabbits will likely prevent this behavior. He may not see the other rabbit, but he can smell the other rabbit, so therefore is telling the other rabbit he is here and that the area is his kingdom.
Here is great information that should help you along: http://articles.extension.org/pages/33013/rabbit-behavioral-problems:-inappropriate-urination