I've been trying to breed my chickens for a few in-game days now and nothing is happening. I have a rooster and two hens in the same coop. Do I need a specific building or item to start the breeding process? I saw something about a Selective Breeding House on the wiki but I'm not sure if that's required or just for advanced stuff.
Also, do different color variants matter for genetics? I have a white hen and a brown hen and I'm curious if the chick color is random or based on the parents.