I am experimenting with wild caught invertebrates to offer my amphibians a more natural variety to their diet compared to the regular feeders that I buy from the pet-stores. My question is that are woodlouse that live underneath flower pots safe to feed or would it be better to capture these from a site far away from an urban setting. Are wild caught nightcrawler from my yard safe or should I just continue to buy them from petstore. Reason I am asking this is that I am unsure if my neighbours fertilizer their lawns and would be worried about cross contamination.