Most ant killers on the market are considered safe for homes with children and pets. However, there are some exceptions, and some are safer than others. For instance, granules are okay to use around the outside of your home, but you don't want your pets to eat them. They shouldn't be harmful once they settle into the ground, so just make sure there are no pets around when you're sprinkling it. If you're concerned, opt for formulas containing essential oil as the active ingredient.