Actually the crest is not apparent when they hatch. It starts to sprout around 2 weeks old. You will see long feathers start to stick up on the head as the down is replaced with actual feathers.
This is a young Silkie about 6 weeks old it's crest is just growing in...
Some of the Silkies from Hatchery stock have very little or no crest. Most backyard breeders are breeding for a nice full crest. Sorry I don't have any picture of good toe separation. But there should be a distince space along the leg for each toe. They should not be webbed at all or look...