I have a Netherland Dwarf rabbit about 5 months old (purchased from a breeder 1 month or so ago). I brought my rabbit with me to the same breeder to see if I could find another rabbit to take home with me as a pet/playmate. The breeder suggested a Holland Lop that is the same size as my dwarf. At the breeders everything went fine. I bought a new HUGE cage w/ all new equipment. I have been letting them be together in the same playpen (attached to the new cage). At first the Dwarf was being kind of aggressive toward the Lop. Now the Lop is standing her ground. They've circled and chased each other. There's been some foot stomping but it's quiet right now. What can I do to help them get along better? It doesnt seem to be too aggressive but how do I know when to step in? I was hoping that they would continue to accept each other like they did at the breeders - the lop groomed the dwarf at the rabbitry!