Hartz UltraGuard Dual Action Flea & Tick Topical for Small Dogs 5-14lbs, 3 Monthly Treatments vs Hartz UltraGuard Dual Action Flea & Tick

These are the same Hartz UltraGuard Dual Action formula in two weight bands, so the choice comes down to your dog's size, not features. Both kill fleas, flea eggs, brown dog ticks and deer ticks for 30 days per tube and come as three monthly applications. The medium-dog version has the stronger owner record, 4.3 from 4,517 ratings versus 4.1 from 2,438 for the small-dog version. Buy the band that matches your dog's current weight and step up only when the dog outgrows it.

• Choose the Hartz UltraGuard Dual Action small-dog version if your dog weighs 5-14 pounds and is at least 12 weeks old.
• Choose the Hartz UltraGuard Dual Action medium-dog version if your dog weighs 15-30 pounds and is at least 12 weeks old.