Two cock birds will be way to much for only two hens!!! You need to have more pullets anyway; if you only have two birds, and one dies, the survivor will be miserable.
No-crow collars can kill birds, I don't think they are a good idea.
Have you considered improving your run security? Chicken wire keeps birds in, and does NOT protect them from predators!
Mary
No-crow collars can kill birds, I don't think they are a good idea.
Have you considered improving your run security? Chicken wire keeps birds in, and does NOT protect them from predators!
Mary