There are about 8 different types of intestinal worm that can infect cats in the uk it is not always easy to spot the symptoms and as your vet will tell you that is why its best to use drontal at least every three months to prevent any serious worm infection drontal is the only wormer to kill every type of intestinal worm commonly found in uk cats which is why vets prescribe it more often than all other wormers put together the unique combination of proven active ingredients in both of th