minicar: I would like to breed my male mini rex bunny he is about 7 months.How old does your mini rex rabbit have to be to breed?get a book. Hopefuly you will realize how much work that is and not do it :~) What will you do with 10~12 more rabbits? And what happens when they rebreed with eachother and you end up with 50~60 more in breed rabits? it's hard to find a home for one rabbit much less 10~12 and more. How many cages and how much space do you have. Have you though this through?How old does your mini rex rabbit have to be to breed?a 7 Month old Mini Rex is sexually mature-- do not use a young doe-- use an experienced one, so he does not get scared off.How old does your mini rex rabbit have to be to breed?Your Mini Mix Rex Has To Be At least 6-8 Months To Breed Any Younger And It Can Result In The Death Of Your Beautiful Bunny Or Cause Serious Health Problems.|||Small breed rabbits like that tend to become sexually mature at 6 months of age. So your male is old enough to breed with.