Hello, my chicks are going on 7 weeks and all healthy and happy save one-Penny. She seems happy enough,gets plenty of food/water, I never see the others pecking or harassing her but she is so small and looks just awful. She's always been smaller than the others but I'm concerned about her growth rate and feathering. They just aren't coming in like the other chicks are. They were all hatched (by us) same day but I'm unsure where the eggs came from. We were told that they were just a mix. Penny & two others seem to be cochins due to the feathered feet. Could she be a bantam perhaps? And is she ok? Sick? This is her Penny on the right and one of her buddies on the left. They both appear to cochins,or some cochin cross but Penny does not look well in comparison Ideas?