Sand hoppers are the little crustaceans found on beaches right? I’m not sure how those would be as a feeder, but I’d be concerned about them being exposed to polluted water.
In regards to wc feeders, I am mostly for it if you know the area is untouched by chemicals. I used to let my Cham’s eat wild insects all through the summer and my parsons lived outdoors spring through fall. Never had issues. Parasites aren’t really a concern and in most cases are species specific. Bacteria is normal to be exposed to, especially for an insect eating animal. The problem is when bacteria gets in wounds and such where it can go wild. With that said, snails/slugs should not be fed wild caught as they can carry rat lungworm which is not species specific. Probably other parasites they carry too, but that’s the main one. If feeding snails, breed them, separate the eggs into new substrate, raise those babies. They are a great feeder in this case!
