I have 6 chicks that we hatched last friday. The last chick to arrive was the smallest of them all and very docile. We noticed that she slept alot and was not loosing her feathers like the others. Then I noticed pasty butt. I have cleaned the area and put Olive oil on it. I have fed them eggs and yogurt with their feed. I have put ACV in the water (1/2 teaspoon to one mason jar of water). She just hides under the ecobrooder (brinsea) and sleeps while the others are up and pecking around. She has had the pasty butt for about 24 hours now but she is getting weaker and less social. HELP.