Flea and Tick Collar for Cat, Made with Natural Plant Based Essential Oil, Safe and Effective Repels Fleas and Ticks, Waterproof, 12 Months Protection, Fits Cat and Small Dog (2 Packs) 4.3 out of 5 stars 2,450. $28.99 #3. Seresto 2-Pack Flea and Tick Collar for Cats, 8-month Cat Flea Collars