When I lived in MN, we put flea collars on all four pasterns all the time to go trail riding, to keep the ticks off. Otherwise, even with spray, which the wet grass would wash off, you could pick (I am not exaggerating) a couple hundred ticks off each leg. And put them on Ticker Tape!! At least the ticks up there are big enough to see- not like Florida micro ticks...We always put those sport boots on them, too- they all had their own set in pretty colors. I miss horses.