So one of my black roosters has been squatting an awful lot lately. He's got a healthy appetite and can walk around, but he tends to stay low to the ground or just hang out in one place. He seems to have a healthy weight, and I can't find any injuries, so I'm not sure what's up. He's a regular sized astrolorp, about 7 to 8 months old, and not one of those heavy breeds that gain so much weight that they can't walk. It's pretty cold outside right now, with temps averaging 50 during the day and 35 at night. But it doesn't seem like he's simply fluffed out from the cold. Do you guys have any idea of what could be wrong? I wont be able to take him to the vet for about a week.