Hi guys. I have recently had 4 baby quail hatch. They were in a fan controlled incubator set at 37.5 c. 2 were yellow and 2 were the dark colour. They were all put in the brooder. Both the dark ones have died. They were considerably smaller, didn't develop so well and one had curled feet. I feed them premium food so I am at a loss as to why the 2 dark ones died . Please can someone help with some good advice.