snip
There is a snail bait made by Multicrop that is basically
chelated iron. It's not as fast working as metaldehyde but
it still seems to work well. It's longer lasting than than
normal baits but grows mould faster than the 'long life'
baits. Being chelated iron it is supposed to be non-toxic to
pets, birds, lizards, etc and any left overs become plant
food.
Andrew

I've used one brand of these ( can't remember the name offhand ) and
while they are fairly animal friendly, they aren't actually non-toxic.

There's a warning on the pack that it can still harm pets if large
amounts are used ( and eaten by animals ). It is a lot safer than the
standard poisons though.

We have two dogs, so we applied it fairly sparingly. Works fine for
killing snails and slugs, and the dogs didn't seem interested in it at
all.
With the regular snail baits, the dogs try to eat the pellets. We
didn't have this problem with the iron based pellets.

Adam