There's always a risk that the cock might kill the chicks. It doesn't always happen but I would remove him.
Theres no problem with feeding Shamo chicks, they may look like vultures on stilts, but all you need to do is to get some proprietary chick crumbs ready to feed them with from 36 hours after hatching. Up until this time, the chicks are still absorbing what is left of the egg, thats why you can or could have day old chicks transported to you. At this stage, the don't require food or water.