my chicken has a bad comb

One of my roosters has been very sick the past few days. He's about 6 years old so I dont think its an old age thing. I first noticed his odd sickly behavior 3 days ago. He wouldnt eat much and he was staying away from most of the chickens in the pen. The day after that I immediately knew...

Good evening everyone. I am a very new, very green chicken owner. I have 10 chickens in a 7 X 2 X 2 mtr run. I got them as 18 week pullets, and I've had them 3 months. We've just completed the fencing that makes the bottom 20% of the garden secure, so started 3 days ago to slowly introduce them...