Chic Can ~ I would love to have the formula for your tick spray if it works well! We are being overcome by ticks where we live and are looking into getting chickens to hopefully help with the tick population. I would love to get guinea hens if I knew they wouldn't be too loud, but that doesn't sound likely. Our neighbors would probably kill us. My son and I both have Lyme disease (late chronic stage that's hard to treat), and now we suspect my daughter has it as well. The dog is constantly bringing them in on him. We treat him with Frontline, but that only kills ticks once they attach. I find dead ones all the time where he has been laying. I started spraying him with a natural repellent, so we'll see if that helps.