Itch - Worming Tablets for X-Large Dogs (20Kg+) - 2 Tablets - Treats Roundworms, Tapeworms, Hookworms and Whipworms - Kills Worm Larvae. There are often no early signs of worms whatsoever. They could be setting up camp in your dog’s guts and you wouldn't have a clue until it was possibly too late.
eBay