
Hartz UltraGuard Dual Action Flea & Tick Topical for Medium Dogs 15-30lbs, 3 Monthly Treatments
4.3Best price now
Compared across 2 stores. Prices are checked against each store and labelled with when.

Compared across 2 stores. Prices are checked against each store and labelled with when.
Hartz UltraGuard Dual Action is a monthly topical flea and tick treatment for medium dogs weighing 15-30 pounds. Each single-dose tube is applied along the back between the shoulder blades and is claimed to kill fleas, brown dog ticks, deer ticks and flea eggs for 30 days. The formula is designed to stay on and not rub off. At $6.52 for a 3-pack at Chewy.com as of November 4, 2026, it is a low-cost option, though it is a budget product with a mixed reputation among owners.
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Lowest price we've seen: $6.52 on Nov 4 at Walmart. Tracked across 2 stores since Nov 4.
Owner feedback on Hartz UltraGuard topicals is mixed. Many report it works well for the price on light flea problems, while others say it did not clear infestations or caused irritation at the application spot.
Tell pesky parasites to ‘bug off’ with Hartz UltraGuard Dual Action Topical Flea & Tick Prevention. Each convenient and easy to apply, single dose tube kills fleas, brown dog and deer ticks, and flea eggs for 30 days. Formula stays on and doesn’t rub off. Use only on dogs or puppies 15-30 pounds, 12 weeks of age and older. Package contains 3 monthly applications. Directions: Remove one applicator tube from package and hold in an upright position away from your face. Twist dispensing tip clockwise about 1/2 turn while pushing down to break the tube's seal. Do not remove the dispensing tip. Position the tip of the tube at the base of the pet's back between the shoulder blades and squeeze out the entire contents of the tube to form a stripe as you move from the shoulder blades along the back to the base of the tail. The treated area may appear oily after application. Repeat every month. Consult a veterinarian before using this product on debilitated, aged or medicated pets. If signs of sensitivity occur, bathe your pet with mild soap and rinse with large amount of water. If signs continue, consult a veterinarian immediately.