Anything I can do they all eat and drink normally but they are starting to fight more and some end up with bloody Crest or wattle
I agree about the Fowl Pox, good suggestions from everyone.
Addressing the fighting is a very good idea.
I'm assuming that since you have pullets, that the "roos" are also cockerels (immature male chickens)?
What is your goals for chicken keeping? Are you planning on breeding, roosters are for enjoyment, food, etc.?
That many males are going to wear out and stress out the pullets. Ideally keeping 1 cockerel separated until he matures would be good, then he can join the ladies.
Separate out the cockerels. Again, Ideally they get their own pen. I get that some people keep "bachelor flocks" but the males do beat up on one another. You can try, but if you are already having issues, then likely they will continue with just the males being together.
Rehoming males you don't want or processing them for food are other options.