We have 7 baby chicks which are 3 weeks old. Today I noticed their Mum pecking the babies tiny feathers to the point of making a couple of them bleed. So would it be better to isolate Mum, or can anyone offer any advice. They all have plenty of fresh water, chick crumbs and more than enough room to run around. Mum is a Silver Grey Dorking. Dad a Buff Orpington. Any advice gratefully received.