The hens are around 2 lb and the cocks around 3 lb.
Nesting boxes on the floor are fine. Make sure you can EASILY reach all the way to the back of the nest box whilst standing so you don't have to get down on the floor to reach eggs. That is why I favor the covered kitty litter pans, since I...
If chickens are raised together from my experience it works out better. However, the more aggressive breeds can "turn on" their friends and start being ornery. Such as not letting them get near the food when they are around, chasing them, etc.
It is best to visit Henderson's chicken chart...
Go broody means they set on the nest and stop laying eggs. They will set there on a rock or even nothing at all.
That is when it is good to give them some fertile eggs to set on if you want chicks. They will hatch them out and raise them.
Silkie roosters are variable. I would say that...