What's wrong with my rooster?

[silkiechick1]

This is my 6 month old rooster. It has been 20-30 degrees here lately, and I've noticed his wattles are longer/larger then normal. I don't know if it's because of the cold or something else or nothing at all, please help!

 

[beb444]

The best I can think of is just that he's growing...