Wow, it's a heavy chemicals thread!
I'm just going to break out my brown rice and sandals for a moment.

I got interested in what the chicken keepers here where I live use. The people who used to fight roosters here have been patching them up for centuries. I got given a tour of one such medical cabinet and there wasn't a single off the shelf item that I could recognise.
For wound washing the herb Thyme steeped in boiling water and very carefully strained is most popular, particularly for eye injuries.
Propolis mixed with honey and calandula (the flower) is used as an antibiotic/wound packer.
I've recently been trying out Aloe Vera and walnut oil for uric acid induced bum rash and it works really well. I'm going to try it on the chickens next.

Quince is popular for digestive issues. Something else gets added but I had a Catalan fail when it was explained to me.
Hard wood charcoal mixed with alcohol gets used as a blood stopper. It gets made into a paste.
There are many more that these people have found effective over generations of chicken keeping. I'm trying to learn a bit about them.
Yup, I've ticked a few boxes because I don't know any better yet.
Edit. Forgot one of my favourites, Tee Tree Oil.