I don't remember any names of products, but there is "nasty" stuff out there jsut for this type of thing. Try just calling your vet and asking a tech what would be good to use. Most vets will answer questions over the phone for established clients.
If you have a petsmart, tsc, pet supply place close by go in and look.
The products are to keep animals from licking wounds or chewing cords and what not. Most home made mixes I have heard of call for cayenne pepper and this will really sting at irritate the wound. Other than that, seperate the dogs for several days until the wound is better.