Hi all! First time horse owner here... last night my husband and I noticed a large lump on Max’s neck. Low and behold a big fat engorged deer tick. The tick was dead.. We worm Max with Ivermectin every 2 months. Just last week he was due to be wormed.. I am wondering if the ivermectin killed the tick? I’m very concerned about lime disease so we will be contacting our vet. Has anyone here had similar experiences? I am very worried about our poor boy Max. I uploaded a picture of the tick i believe is a deer tick.