Retired racing greyhounds from the U.S. should be considered chronically infected with hookworms. Stool sample results are often negative, so pay attention to the appearance of your greyhound's stool, not the stool sample results. The larvae lie latent in the greyhound's muscles, only to migrate out in times of stress. Therefore, if abnormal stool occurs without any other reason, it would be reasonable to proceed with a five-day course of Panacur (fenbendazole). Any change to your greyhound's environment or routine, such as moving to a new home, thunderstorms, boarding, or other illnesses, may cause stress to your hound. This can contribute to hookworm outbreaks.

Fenbendazole is available at feed stores or online in Merck brand Safeguard Dewormer for Goats. The dosage is 1 tablespoon per day for 5 days.

For discussion on hookworm in greyhounds, you may request permission to join the Facebook group: Getting Rid of Parasites in Retired Racing Greyhounds. (This group is not affiliated with Greyhounds Only.)