I've read on here that chickens are very smart, curious creatures, but it still amazes me. Their little brains are the size of what? A pea? My girls have been in the coop for two weeks. Within the first few days they knew to go right up the ramp at dusk, and they come when I call them. They are so sweet too. I find myself using the same voice with them that I use with my infant. I can see how people become attached. I'm glad we weren't planning to use them for meat, I could never do it.