Is there a way to determine a chick's age based on feather growth? We bought the babies from the feed store and didn't know their age. They've been living with us for almost two weeks. Wing feathers are coming in nice and dark. I think two are getting darker feathers on their breasts. They still have fuzzy baby feathers on their backs, or between the wings. Any idea on age? edit to add: they can each fly a few feet up, and down. I'd guess they're about a pound in weight, feels like a small dumb bell when picking them up. These are babies earlier in the week.