Even when two products on the markets seem to be very similar, it is important that you compare all their differences before deciding which one is best for your dog.

Interceptor Plus and Heartgard Plus are both fast-acting monthly chewables that provide protection against heartworm, roundworm, and hookworm. In addition, Interceptor plus prevents whipworms and tapeworms.

The different active ingredients in these products may affect your choice between the two. Interceptor Plus contains Milbemycin Oxime and Praziquantel, while Heartgard Plus contains Ivermectin and Pyrantel Pamoate.

Interceptor Plus is suitable dogs and puppies at least 6 weeks old, with a body weight of 2lbs (0.9kg) minimum. Interceptor Plus not been evaluated for safe use on breeding, pregnant or lactating dogs.

Heartgard Plus is suitable for dogs and puppies at least 6 weeks old, with no weight requirements, and is safe for use with pregnant and lactating dogs.

Top tip: Once pets develop heartworm it can be very hard to treat, so prevention is always better than cure. Compare the major brands of heartworm preventatives.