i would start treating for cocci, amprolium/amprol/corid etc
its a good place to start
We also have just gotten 2 ameraucana a black and we think either a blue or lavender. they are both 2.5 months old ..could you post a picture of your blue /lavender chicken so we can decide which we have. Thanks
The lighter is one of my Lavenders and the darker is a blue. Although, blue comes in a lot of shades, one of which is lavender, I believe.