It will be in a red and white cardboard tube with buff orps on it.
If it's an injury, you need to figure what kind of injury, a sprain or what.
Blue comb typically don't go with sprains.
A tractor supply in North Carolina has no permethrine livestock products? Go to the Farmacy, it will be close to the pick no more and hen healer, if not go to the horse mask area and look for it there.