Best long-duration OTC collar optionFlea & tickSeresto
Seresto Flea & Tick Collar for Dogs Over 18 lbs
Collar listed for up to 8 months of flea and tick protection for dogs over 18 lbs
Lower-cost Seresto-style cat collar
PetArmor
Budget tier: $$
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Cat collar listed for up to 8 months, for cats 10 weeks and older
PetArmor's Extend collar for cats is listed for up to 8 months of flea and tick protection for cats and kittens 10 weeks or older, and the listing says it uses the same active ingredients as Seresto. The EPA has received incident reports for Seresto-type collars; ask your vet. This is shopping guidance, not veterinary advice: confirm fit and follow the label.
Who it's for: Cats whose vet is fine with a collar-style preventive.
Skip if: Your cat is under 10 weeks, sick or nursing; talk to your vet.
Alternatives with different tradeoffs — not clones of the same pitch.
Best long-duration OTC collar optionFlea & tickSeresto
Collar listed for up to 8 months of flea and tick protection for dogs over 18 lbs
Best OTC collar option sized for catsFlea & tickSeresto
Cat-labeled collar listed for up to 8 months of flea and tick protection
PetArmor Extend Flea & Tick Collar for Cats