The rooster is the male, the hen is the female.
Just about any farmn that has them running around will sell you a few. Elevators also will have them.
Of course it is. Hens do not need a rooster to lay eggs. The eggs you purchase in most supermarkets are laid by hens that have never seen a male bird. Roosters are kept with a flock for fertilizing...
No, they're called Fowl.