Vet Rx is a topical solution that can be used on poultry to heal wounds, or in our case, to make the comb and wattles "redden up" at a poultry show. It does tend to leave a white "dusty coating" on the comb and wattles if it is used too much. It can be hard to find. We have to go out of the county to buy ours. You can also get it online.