stomach balding

Hiya! I have 4 boy coturnix quails, they grew up together but have to live alone due to either attempts at mating or aggression. I'm not sure which one!! I have one bird in particular, called Arnie. He's especially friendly and loves any kind of human attention, but I have a problem. He's bald...

Hi everyone! I've been using straw for litter with my chicks. I got them a week ago, and I've changed out the straw once so far. Is this proper litter? Their stomachs look all crusty but not red or irritated. Is this okay? Or is it because the straw is getting wet from the water feeder? Not sure...