Hard to say from the pic. She isn't in a normal stance - she could be quite slender but just look fluffy. Can't really tell what the chicks are either.
She's some kind of partridge chicken but can't really tell from the photo what kind.. She could be a Wyandotte, wrong comb but sometimes they get single combs.. Is she a bantam?
Edit: hahah I just reread your title.
Really no idea. She looks too foofy to be a game bird, but without leg feathers not sure what else she could be.