Ok so all the sudden all four my dogs get spots all over them an they are itching like crazy. Long story short we spent like over 500 on treatments an finally have a allergy test done on one dog. Comes back today as mites like on ducks etc. so all along I guess my dogs go out to potty an somehow mites jump on them from the chickens over in the other pen. So are these mites over in the yard too or just jumping off chickens on to dogs then getting off? I know we need to now dust the heck out of chickens but what do we do to make sure yard is free from any of this so when we let dogs out they are ok?