Hey Ruth,
I'm being reminded of when one of my girls was chewed up by my neighbors dog. Long story, but when I went to go get her body from the dog, there she was, looking at me. It took about 3 weeks as she had huge tears in her skin. I figured there was so way it could heal they were so large. I posted on BYC and was assured that not only would she heal, but it wouldn't be long before there would be no evidence of the wounds. Everyone was right! Those tears do indeed heal from the inside out. The smaller tears healed within a week, the feathers started growing back soon after, and the large laceration began to heal quickly too. I cleaned it daily with vetricin and neosporin, and left it open to air (she was inside for the bulk of the healing time). I did wrap her up (with an ace bandage) when I put her back with my flock so they wouldn't peck at the still healing skin. One thing I did which I swear helped a lot was a scrambled egg daily for the first couple of weeks. I've heard it is the perfect food, and honestly i think it is true! Anyways, so glad your girl is getting better. Pretty soon you'll never know it happened!
Cheers!
Kate