I showed pedigree rabbits for 6 years, and we raise rabbits now.Currently have 23. Young bunnies are hard to sex. But one sure way, if they are old enough, is the males have visible testicles. If you have them all in one cage, watch them carefully. If those male's testicles have dropped, they will most definitely both breed the doe, and the deed is done very quickly. If you are certain you've sexed them right, you should separate all three. Often putting two males together, they will fight; and, boy oh boy, they'll tear each other up. I don't know what your setup is, but it's vest if you keep the bucksin one set of hutches and the does a dustance away in another set of hutches. Otherwise, the bucks will get over stimulated by the does. When we vred show rabbits, we built a rabbit barn. All our wire cages were susoended from the rafters. We kept does on one side and bucks on the other side of the one-room barn which is 20 x24'. We also kept sheet metal on each side of the alcages, so they wouldn't speay each other or nip them through the cage wire. Can you ask the people you got them from when they were born? Or, I'm sure your county has a local rabbit association you can call to get more information. If you live in arural community, anyone involved in 4H could orobably steeryou in the right direction, too. Without seeing their genital area in a picture, no one will be able to tell you the sex of the bunnies just by looking at them.And a photo may be difficult to tell, too, unless, as I said, those males have dropped their testicles. Hope this helps a little. What are you going to do with all of them? Except for 3 of ours-2 are my pets and the third one is a big old rabbit a man gave us two years ago, so therefore we will let him live out his natural life with us,but we raise ours for meat.Rabbit stew is delicious. New Zealands are an excellent meat rabbit, btw.