I thought they were designed to strip off the slimy coating, rather than poison the slugs/snails?

I'm glad to hear that a light scatter of blue (cheap) pellets won't hurt the hedgehogs, but I'd like to know if the blue pellets are harmful to newts, as I have a lot of them and would like to keep them.

Also, related question, ant powder seems to kill woodlice, does ant powder harm newts? Or frogs?

Please, someone, respond: I'm beginning to feel like the Phantom Thread-Killer!