Do Seresto Collars Kill Fleas?

The Seresto Flea and Tick Control collar is a popular choice for dog and cat owners trying to get rid of fleas and ticks on their pets. ... Seresto is clinically proven to kill fleas within 24 hours and actively repel and kill ticks through contact, so no bite is required for it to work*.

Does Seresto collar kill existing fleas?

Seresto kills existing fleas on dogs within 24 hours after application. Once collar has been on your dog for 24 hours, re-infesting fleas are killed within two hours. Infestation prevention with new ticks starts within 48 hours after Seresto collar application.

How effective are Seresto flea collars?

This is the first thing we've ever found that got rid of/killed the fleas! ... Since the collar worked, I've also ordered one for our little indoor dog and the indoor cat, who also have fleas (but not as many). If these collars really kill the fleas for 6-8 months, they are worth every penny of the cost.