No ducks, not enough possums, and I would need to own a salt mine. I will risk the occasional (whatever "thing") that eats those dead slugs and snails. I am not sure eating them would harm it/them regardless. My 600+ orchids and 400+ other tropical plants are far more important to me. I use the heck out of my oaks and cedars. They provide shade and comfort for/to my plants during the spring and summer. I don't necessarily hug them though.
