Anybody ever used a zinc supplement in feed for dogs during their working months? I was asked by a guy that runs a lot of coyote dogs to find it for him through work (we use it in cow feeds). It helps them heal faster and keeps their foot pads in a lot better condition running in hard snow and he swears by it. Have any of you ever used them on your bird dogs. I am getting it in and my try feeding it to my dog this fall to help with the thorn scratches and torn pads.