quail behavior

My chicks has a crop well I think it does. Every time I feed it it grows like a balloon. We don't feed it for a while so it goes then when we feed it, balloon. Cycle never ends. We give a massive dish of water which I see it drinking very regularly. I feed my chicks egg yolk. It's 10 days old. Hell?

So my first hatch 4/22 of quail have reached crowing age. I’m wondering, do they all sort of reach crowing age at once? Or is it sort of more specific to the bird? I sat and watched them a bunch today and there was only one crowing, and I’ve been hearing his crow for a couple days now. He’s also...

Just a couple of quick questions, more out of curiosity than anything. I have noticed that my celadon babies are growing at a much slower rate than my non-Celadon quail did. They eat less, drink less, and are smaller. I'm wondering if this is going to make it hard to integrate them with my...