ok so the fair was this weekend and my lil sisters decieded to my d'uccle to the 4-h show along with their chickens. anyways the sussex was by anouther chicken that had mites on its legs. what are the chances that she will get those mites, should all the chickens and 2 ducks be treated even if we dont see any mites, and whats the safest thing to use on chicks and around other animals such as dogs cats rabbits horses ect?