16 week old rooster fertilizing eggs

[str8m8]

Hi my 16 week old leghorn x rooster is fertilizing the eggs of my 9 month old leghorns .He has been mounting them since he was 10 weeks .Are there any problems that arise with chicks of young roosters?

 

[sourland]

They'll probably grow up to be oversexed like their Daddy.

No problems. Leghorn cockerels are generally fast maturing.

 

[str8m8]

This guy is crossed with a white sussex and is already twice the size of my leghorns .also is it normal that he only mates the white birds i have Australorps and lohman browns and he despises them and only attacks them all hens?