This spring I bought 6 pullets at tractor supply...or what I thought were all pullets. One of the "hens" was looking more and more like a male so we figured tractor supply just made a mistake and put a rooster in with its pullets so we just kept it and let it go where it wanted. Today I went outside and the rooster was squatting in its pen(not the nesting boxes) and it laid a medium size white egg, the second it hit the ground the hens rushed over and ate the egg. It was its only egg I know of. Is it a rooster or hen? Why did it lay an egg?