A few months ago Trooper, one of my Collies, tested positive for Lyme Disease. Thankfully my vet had decided to start testing dogs in Chicago for Lyme Disease after she saw a few cases recently. He must have caught it during one of our infrequent visits to a friend's cabin in Wisconsin. All three of my dogs have had ticks even with preventative topical solutions applied beforehand. After numerous blood tests it has been determined that Trooper will be completely fine and we intervened early enough.