Rabbits do not mind who they mate with and will continue untill they are very very old [ the boys that is]. In the wild its a little different because the does will only mate at certain times eg:spring and early summer, but captive rabbits will breed all year round, because there is no shortage of food during the winter. They do not know or recognise children cousens or anything like that, once babys are old enough they would breed with any rabbit available. val