Brought home 11 chicks from Atwoods yesterday. 2 are larger with feathers on wings. 3 have no feathers. The rest are somewhere in between. I noticed today in the brooder that someone is pooping a really runny poop while others are leaving more solid 'worm' poops. I couldn't determine who is doing what. Do I need to be concered or do anything different? They are all eating medicated chick feed.