What breed is this?

The beak has us a little worries as we don't know if it's normal, also it seems a bit smaller than the other bantams and I'm worried I can feel the bone on it's chest, I'm not sure if it's a breed thing, i don't see how it could get this old without eating, also it has a constant drawn out high pitched peep that is nothing like the other chicks

I want to know the breed to make sure none of this is a has to do with that and if it needs special treatment

part of Murray McMurray 15 assorted feather foot bantams