Hello- So sorry to hear about your hen! Here's what I personally would do: Clean and rinse that wound really well, and then I'd stitch it down. Just a few stitches to hold it. Use a very fine needle. You can totally do this. Wrap that hen up in a towel, so she is immobile, cover her eyes if you can, and believe it or not, she will be very still. If your hubby or kids can hold her, that is good.
I've had to do surgery at home for bumble foot, and my experience is that, once they are restrained in the towel, and layed on their side, they just sort of go cryptic. They lie there very still, never making a sound.
Not everybody can do that though, because there is blood, so if you can't, it's understandable. When I first did the bumblefoot surgery, I was a nervous wreck. I became all sweaty and my hands just shook......it turned out great though!
Good luck to you!
Sharon