One of my nearly 4 week old chicks has got quite a few cuts on it's feet. Perhaps they are peck marks? No other signs of sickness or distress in this chick or any of the others. Had anyone else had this before? What might be causing this? They've been there a few days with no improvement. It doesn't appear that the chick is being picked on by any of the others. Chick is still eating, drinking and playing like normal.