The following Heartworm preventatives Sterner Veterinary Clinic recommends. For more information please visit the links provided.
HEARTGARD PLUS is a beef flavored chewable for dogs given monthly to prevent heartworms. Heartgard Plus (ivermectin/pyrantel) also controls roundworms and hookworms. (Available in tabs for dogs with beef allergies.) Heartgard does NOT protect against whipworms. All dogs should be tested yearly.
Please visit http://us.merial.com/pet_owners/products.asp for more information.
SENTINEL (milbemycin oxime/lufenuron) Flavor Tabs given once a month for the rest of the pets life to prevent heartworms and flea infestations before they occur by breaking the life cycle at both the egg and larval stages. Sentinel does not kill adult fleas. All dogs should be tested yearly.
Providing continuous protection against harmful parasites such as roundworms, hookworms and whipworms is critical to protecting your dog's health. After all, worms can be present at any time, even in cooler climates.
Please visit Sentinelpet for more information