The grub killer on your yard is a good plan. Milky spore is a good way to go, it isn't poison, it is a bacteria that will kill grubs in the ground before they do their damage and it won't hurt your pets. You put it on your lawn twice a year and water it in. You don't use a spreader, you put it on in a grid with a tube. It is a little expensive but it will work once you have the bacteria in your soil.