Id like to get a few fertile banty eggs for my broody banty. I have two OEGB hens and one roo. The roo has been too busy with his 16 large girls to get his little girls fertile. Before the big girls started to lay last month, all my banty eggs were fertile. Now, none of my eggs are fertile, my boy is far too small to breed the big girls. If I put him in a large dog crate with my one other banty hen, how many days do they need to be together to be assured that her eggs are fertile? I only want to collect a few for my broody but don't want her sitting on infertile eggs. Thanks!