One of our dogs got one of the chickens last weekend (additional fencing has already bee put up) and she lost most of the skin on her head. After reading some stuff on here we have been cleaning it out and putting plain neosporin on it every day but now it seems to be blistering. Is this normal? What else can I do for her? She is being kept separate from the rest indoors so we can keep an eye on her as this is our first time having chickens.