Consider using nematode controls for snail and slug problems. Lawns and herbicides. Hate lawns and mowing them. MOW THEM HIGH and water less but more deeply. Plant the right lawn seed to begin with.
Tall fescue is an often overlooked seed in the blend mixture.
Oftentimes as Wesley pointed out they are wrong. Deadly wrong in many cases. Something many Nursery person's don't mention. Yearly it had been sheared back, much as most people due to Mugho pine. First year I opened it up.