he has been sitting on the eggs just like a hen that is broody I haven't seen him get upHe may be a hen, especially since silkies can be tricky to sex.
...Or he's a rooster trying to encourage the hens to lay. My roosters do it sometimes, it's absolutely adorable. They go in corners of the coop, sit down, and make lovely little clucking noises. They really want children, I guess.
That's definitely a little hen!
Looks like a girl, can you get a good picture of the comb? How old is it? It could use a beak trim.
