They will eat on your plants, but haven't killed or even horribly disfigured any of mine yet. They breed like crazy and I didn't think anything ate them, but the past few weeks I have had Carolina Wrens poking around in the mulch and I have noticed a slight decline in snail numbers. I am crossing my fingers that they are indeed eating the snails and continue to do so. Also, beer traps near your favorite plants helps to protect them. Use a plastic bottle or jar with a lid (I like to use empty peanut butter jars) and cut 3/4 of a hole in the shape of an upside U near the top and bend the plastic inwards to create a lip, then half bury the bottle jar and fill with cheap beer. I do this near some of my more prized plants and they don't get touched.

They will eat the roots of your plants. Pick them off quick!

Jane

I use this:

snail have been bad this year. i do delight in picking them off the plants and crunching them under foot but I did break out the Natria (?) slug bait for the worse areas.

we've had bad snails as well..like Laura I've spent a lot of time crunching them...will probably try some of that bait next time.

Good to know. I just saw a snail hidden under one of my pumpkin leaves and wasn't sure whether to move him or not. I caught a slug sneaking out the other day.