Years ago, we had a lot of snails and slugs in my wife's flower garden. She dislikes slugs and bought death powder to sprinkle on them. I picked out all the snails I could find and took them to another, smaller garden with small plants, but no flowers. Two days later, all the snails were dead! I asked what happened to the snails, and Wife said, "Oh, I found a lot of them in the front garden and killed them while I was 'doing' the slugs." Communication failure on my part!