breeding problem

I have a 6 month old silkie cockerel. I've decided he is my keeper. I'm obviously keeping him for breeding purposes, so the fact he can't figure out how to mount hens is a little concerning. I'm not super worried yet, as he is only 6 months old and I only need to hatch chicks from him in 3-4...

Today while outside I noticed my Royal Palm hen running around with something odd in her mouth...it turned out to be a dead chick! I was horrified and ran over to the nest to find the tom pecking away at a 2nd chick! I started yelling at him and immediately ran into the pen and took the chick...