You have to be a little careful about putting ointments down inside of wounds. The body has to evacuate it back out, since it can't be absorbed. This is not the kind of wound I would use silvadene on.
It's not unusual at all to be able to smell a wound. Often when we bandage injuries will leave the bandage on for three or four days before changing it, to minimize disrupting the newly growing granulation tissue, and they get pretty stinky.
While you can use diluted betadine to flush wounds, I think what you're doing already is fine. When you do your bandage changes put a warm Epsom salt compress on there to soak out discharges, improve blood supply, and help her be more comfortable.
Thank you for your guidance. Tom is fighting me on opening up the bandage to check it, thinks it should stay closed, but I disagreed, that I thought we should look. It's been about three days now. Last night with him holding her, I did spray some Vetericyn from the top, no ointment, so it would trickle down into the area, didn't want to risk pulling it apart if it was trying to close. Seems the wound may be beginning to close/re-attach some already. I know that body fluids and the ointment I initially put on it will have a smell, but it does not appear infected to me. It was already dry when I discovered it, did not appear to be infected at the time so thanks for that reassurance. I do have Epsom Salts so I will do that, thank you so much, Mary.
She is pretty feisty and she's huge, plus she acts like it may pain her some, a combination that ends up with her fighting everything I try to do, but we'll make her submit. She's already pecked me twice when I reached into the hospital cage, LOL. She has been moved to the empty 5x8 pen so she can walk around more and won't become stiff from sitting or standing in one spot. Again, thank you for all your support. I've never had an injury exactly like this, though two big blue Orp hens with Suede had side injuries from his ungainliness in mating with his 14 lb self trying to balance. And of course, her age concerns me since we already lost three of his hens at the beginning of this year to, I guess, old age. Tells me she is Grandma Moses as far at this line of Brahmas goes.
If she survives this, I'll have to then decide how to put her back with Bash because of the where the tear was and the way roosters breed their hens, standing right on top of where the wing tore off the bone.