Heartworms are thin, white worms that live in the heart, lungs, and blood vessels of animals and are primarily associated with dogs. They can grow to be up to a foot long and hundreds of worms can ...

Drugs that prevent heartworm infestations in dogs are almost 100 percent effective, Dr. Dan Treat of Animal Health Clinic in Fargo says. Two are available under the brand names Heartgard and ...

Heartworm disease affects both dogs and cats and is growing quickly into the No. 1 problem parasite affecting our pets. The summer of 2010 was a boom time for heartworms. Last summer’s sweltering heat ...