Question 1

Which is better, Seresto Flea & Tick Collar or Hartz UltraGuard Pro Collar?

Accepted Answer

Based on our testing, the Seresto Flea & Tick Collar scores higher overall at 9.3/10. The Seresto Flea & Tick Collar scored 9.3/10 and the Hartz UltraGuard Pro Collar scored 8.5/10 in our Best Flea Collars for Dogs 2026 evaluation.

Question 2

Is the Seresto Flea & Tick Collar worth it over the Hartz UltraGuard Pro Collar?

Accepted Answer

The Seresto Flea & Tick Collar scores 9.3/10 while the Hartz UltraGuard Pro Collar scores 8.5/10. The Seresto Flea & Tick Collar is our "Best Overall" pick in the Best Flea Collars for Dogs 2026 category.

Seresto Flea & Tick Collar vs Hartz UltraGuard Pro Collar: Which to Buy?