Iam looking for something that works to keep the ticks off my horses. In just the last few days iv found eight to ten deer ticks on my horses. Want to avoid having sick horses again this summer had a bad case of lyme dease last summer. Iam now worried iam going to have sick horses again some of the ticks I found were on over twenty four hours. I have been spraying them but that isnt keeping the ticks off so need something that will at this rate iam going to have another case of lyme dease.I live in a area that is a hot spot for lyme dease there were hundreds of cases last year and it already starting up again this year.