I live 15 miles from Lyme ,Ct. where the disease was first diagnosed. Been lucky to have never contracted it, but know plenty of folks who have. I use Sportsman's Repel , never had a tick on me while using it. The deer ticks also carry babisiosis and erlichiosis , diseases that are as bad or worse than Lyme. Seresto collars work great for dogs, a little pricey - about $50 ,but they're good for 8 months.