We have many, many ticks up here in NY. The past 2 years, they are really bad. I am always picking them off the horses, cats and dog. The dog got the Lyme vaccine, so that is somewhat comforting. My stallion had Lyme disease last Spring and was treated for 5 months with twice daily antibiotics to clear his system. He is now fine and enjoying THIS Spring. When a horse begins to walk gingerly, it's a probable sign of Lyme. The joints begin to get sore and achy. I have heard that tee tree oil works well to prevent them. And always be checking for the little beggers!!