Sulfur pellets sprinkled around your plants are supposed to repel many critters (sulfur does stink - but does not seem to work on insects only mites and chiggers, and mice or squirrels), and also help to acidify soil over time.
Bio slug pellets use sulfur as the active killing ingredient:
https://orcalinc.com/products/...
And thankfully, the pellets are pet-safe.
This is the version I use:
https://www.amazon.com/dp/B00N6X8OWE/
I find many empty snail shells after using it. And my hostas have thanked me.
Oh, I forgot to say, people use copper to get rid of slugs and snails. Copper tape as a defensive perimeter works wonders.
That said, copper-sulfate is used to kill the roots of trees so I would be a bit careful using copper.