I grow pumpkins in my garden and use the seeds to deworm. Pumpkin seeds are a great deworming tool. Plus no threat of anything contaminating the eggs and meat. And many health benefits to eating the seeds. In the fall I harvest the seeds and freeze them. Once a week I feed the seeds to the birds and have had no trouble with tape worms. A few times a year I take some of their poops to the vet to check. But always clean.