I want to thank each and every one who has posted - this site is such an awesome, caring, helpful community and I am glad to be a part of it.
First, an update on the chick: "she" is doing well and repeatedly bit me last night while I was checking her wounds, which I take to be a good sign. Lots of life left in the little one. I currently have her in a separate brooder with both a heat lamp and a cool area so she can choose where she wants to be. I also put in a small cardboard box so she could "hide" in it and feel secure and she really likes hanging out in there. I did see some feed crumbs in her beak last night but I haven't actually witnessed her eating or drinking. There's NutriDrench in her water too. She did not touch the scrambled eggs.
FlyingNunFarm came over today to bring me some hen aprons (my Orpington rooster just can't help himself - his hens are just too pretty!) and helped me out with the flayed chick. Kimberly washed her off, sprayed her with Vetericyn and liberally sprinkled sugar on the area missing skin. The chick seems really tired since then but I'm hoping she will perk up tomorrow. Her wound does not appear to be inflamed, oozing or puss-like.
I will try to keep posting regular updates on her progress and I'll try to get some updated pics tonight when my husband gets home.
As far as the rest of it goes, I am very much leaning towards the belief that Silkie Mama did it. Last night, we closed off that coop so that the rest of the chicks couldn't go in it. As it started getting toward bedtime, we found the rest of the chicks huddled together as close to that coop as they could get. Silkie Mama had put herself to bed in the big coop with the other chickens and ducks. We put a large dog crate in the big coop and put the chicks in that for the night. I'll probably have them in the dog crate at night for a few more nights and then see how they do.
The odd thing is that this is the third Mama we've had use the small coop and each time, at a certain age, each Mama hen has decided, "Now is the time for the chicks to be out during the day with the rest of the flock" but still had them sleep with her in the small coop for a while before deciding, "Now is the time for us to all sleep in the big coop with the rest of the flock at night" and finally, "I'm not your mama anymore - don't sleep under me!" Up until last night when I separated them, Silkie Mama had still been having the chicks sleep with her in the small coop, and not just with her but
under her too. You'd think that if she didn't want them with her anymore, then she would have just gone off and moved her sleeping arrangements to the big coop.