Let's talk about George. He's a young rooster who found himself alone in the world, went through a months-long quarantine, and now has a shiny XL dog crate full of five-week-old Isa Brown pullets parked in his coop. He eats next to them. He doesn't lunge at the bars. He's been a perfect gentleman. The question is: when does a good boy get his ladies?
The short answer is: not yet. Those pullets are fully feathered, sure, but they're still a quarter of his size. That's a size gap that can turn a friendly rooster into a clumsy disaster. Even if George has shown zero aggression through the wire, the real test comes when the bars disappear. A young rooster with no prior experience around hens doesn't always know how hard he's being. Five-week-old pullets are not ready for that learning curve. They're still growing bone and muscle, and a single overeager mating attempt can injure them badly. We'd wait until those Isa Browns are at least twelve weeks old, ideally sixteen, and closer to half his weight. That gives them the size and the confidence to dodge, tell him off, or simply walk away.
What this means in practical terms: you have a few more weeks of crate introductions. That's not a bad thing. You've already done the hard part, quarantine, visual contact, shared meal times. Keep that routine. Let George watch them grow while they watch him pace. When the pullets are big enough to stand their ground, do the introduction in a neutral space, not his coop. A pen neither of them owns removes the turf factor. And have a backup plan, a separate run or a second crate, in case George forgets his manners. He's young, he's eager, and he's never done this before. That's not a character flaw; it's a reason to take it slow.
We'd tell any reader in this situation the same thing: you're doing everything right. The quarantine, the crate, the patient observation, that's how you build a flock that works. George will get his cluck-tastic lady squad. He just needs to wait until they're ready to handle his enthusiasm. Give them another month, maybe two, and then let the fowl play begin.