9 wk Roos, no crowing but 2 mounting hens?

[LegginMF12]

I have a total of 7 roos now and now one has started crowing yet (this is a good thing) but S.O.B and G.D have attempted to mount hens several times now. Is this normal? They will also fight between themselves quite a bit.

 

[Duker17]

I have 2 bantam roos that just started crowing (as far as I know) last weekend. They are 12 weeks old. I have not seen them mounting hens, but so far they are both very mellow, maybe the hormones just haven't kicked in yet. Perhaps your roos are just trying to establish dominance. I also have a slw, roughly the same age as the others, that is constantly picking fights, mounting the other birds (or attempting to), and just causing a ruckus wherever she can. I just assumed she is going to be my "bossy" hen.