I consider myself very knowledgeable in raising chickens as I have had them for about 20 years . This one stumps me..I have a Sussex bantam cockerel...about 5 weeks old...he has lost almost all the fuzz on his head except for a tiny patch at the very top that consists of probably 4 actual feathers all stacked on top of one another..makes him look like he has a small "tuft". No new feathers took the place of the fuzz on his head or the top of his neck. His skin seems "thickened" around his face and comb..not swelled..just thicker. I also noticed that one of his legs is noticeably larger than the other...the whole leg..not just the joint...though the foot seems fine. Any ideas? I have searched online and found nothing similar to this.