Okay, so the girls both have single combs, which would make them cochin mixes.
The boy, it's still a bit hard to tell because he doesn't have all of his feathers. If you want, you could repost some pictures of him once his feathers grow in, but even then there is no guarantee that we will be...
It's kind of hard to tell from the photos. Do you know what type of comb the girls have? Could you take some closer pictures? They look like mixes with maybe some brahma in them.
The boy is some kind of game bird, most likely a mix.