Thanks. I don't know what the difference is between the two; maybe there isn't any and SHT is just a brand name.
I've suggested SHT on a few posts but it's a 'new' idea that is in fact very old, just not common here it seems.
I agree with you that seperation is far from ideal. I try whenever...
I would consider coating the head wound with pine tar or Stockholm Hoof Tar which is what I use.
Apart from sealing the wound which is important. chickens don’t seem to peck at it.
There is an article on using Stockholm Hoof Tar in my articles.