We have 13 chickens, all about 4.5 months old. Guessing 5 pullets, 8 roosters. We've been eyewitnesss to 4 different crooners. We let them free range Ina large penned in area with our goats. Occasionally they squeeze through the fence or fly over it only to come rifght back onto the right side with the rest of the flock, last night, we go to put them away for the night and only counted 12! We looked and saw a small amount of feathers in one area ...not sure if that means a predator, again tonight we put them away and another rooster is missing. Is it possible the 'head' rooster is chasing the other roosters out of the flock?