Anyone use these? I personally have a hatred for roaches however I have a friend that works at a vet clinic and offered some up. I know nothing about these as feeders. Are they hard to come by? Can frogs even eat them? Do they offer any advantages? I probably wouldn't culture them for myself (I really hate roaches) but I'm trying to be a good d.b. member and offer to secure some starter cultures so as to get some availability if they are worth bringing such filth into my home.