The adult mites are transmitted by direct contact between animals. Female mites can survive without a host for several days, so your dog can become infested just by being outside. Mite infestations can cause your dog to scratch, and create sore, red and scabby skin.
Why your dog needs VECTRA 3D
Mites (excluding mange mites):
Repels mites (excluding mange mites) and prevents further infestation.
Remember that no product is 100% effective.