A month or so ago I posted a picture of one of my two roosters that had been beaten up by the other rooster. Luckily, he recovered and is now even crowing and doing other roosterly dooties. However, there are times when both of my roosters crow- sometimes at the same time! It is like they don't even notice each other. They each crow, and they each give warnings of potential predators, and each mate (actually, they each tried to mate with the same hen once). Is this behavior common?