Heartgard Plus 23–45kg Large Brown is a monthly beef-flavoured heartworm chew for large-breed dogs. It prevents deadly heartworm disease and treats roundworm and hookworm in a soft chewable format dogs accept as a treat.

Each chew combines ivermectin and pyrantel at the large-dog dose: ivermectin prevents heartworm by killing larvae before maturation, while pyrantel controls roundworm and hookworm. The beef flavouring is made with real beef to maximise acceptance, and the monthly routine integrates easily into a broader parasite prevention schedule alongside flea and tick products.

Large active dogs get more mosquito exposure than smaller indoor pets, which makes consistent heartworm prevention especially important. Heartgard Plus's chew format keeps it practical — no spot-on residue, no pilling, just a monthly treat.