Amdro Ant Block Home Perimeter Ant Bait gives you the power to kill listed ant species outside before they enter your home. Once you lay the bait, worker ants carry it back to the mound thinking its food. Once the queen eats it, the colony is doomed because she can no longer produce worker ants. Use it on lawns, landscaped areas, or around structures. Each bottle contains enough bait to treat the average home up to six times. Stop an ant invasion before it starts with this. Amdro Ant Block. It is a preemptive strike against invading ant forces. As hungry worker approach in search for food, they will quickly seize the bait instead. The active ingredient in Amdro Home Perimeter Ant Block Killer Bait has very low toxicity to people, animals and birds. When used according to the label we wouldn't expect any problems to your pets.