We have too many ants and friends have started putting DE on the ant mounds, which seems to be helping. They are buying a type in the lawn section of Lowe's but I don't remember how to know if it is safe for the chickens. In addition, we have snakes getting around the pool and garden. Mean snakes like copperheads and cottonmouths so I was thinking of putting down some lime so encourage their movement elsewhere. What kind of lime do I need to buy for it to be safe for the chickens? They are allowed free roaming time each afternoon and I don't want to injure them unnecessarily but I would love to encourage the ants and snakes to visit someone else.