Does anyone know if Buff Opringtons develop slower then other chicks? We have 3 buffs, 3 Amerucanas and 1 Production Red. They were a week old Wednesday. The others have some tail feathers and most of their wing feathers, but the buffs only have some fuzz on their tails. The buffs are about 20 grams lighter then the other four. I've been taking the buffs out and giving them some food on the side to see if that helps out. Does anyone have any suggestions?