In Dr. Pitcairn's Book, Natural Health for Dogs and Cats, he recommended alternative treatments for tapeworms. One was giving papain, which is a powder made from Papaya. I used Royal Tropics, The Original Green Papaya, Digestive Aid. Their website is http://www.gincointernational.com/ . Their supplement just contained Papaya. Most other brands contained other ingredients. I gave Buddy 1 capsule in his food each night for 2 weeks. I haven't seen any signs of tapeworms.