My bantam gamebird rooster's top comb appears to have changed color

[akd23237]

It was larger and redder, now it looks shriveled and browner? Is there something wrong with him???? I'm in Miami, Florida, and he is a free-range rooster. Ever since the cold front came into Florida, I think he's been moving around less....I haven't seen a change in his appetite....What do you think?

 

[ChickLuver]

This has happened to my bantam cochin frizzle roo also. I don't know why or what makes it happen. It went back to normal and now it has happened again. He's not sick or at least appears normal!

 

[FrontPorchIndiana]

How cold of a cold front? He didn't get frostbite did he?