Amazon has 3-Dose PetArmor Plus Monthly Flea & Tick Prevention for Cats on sale for $12.98 - $1.95 (clip the 15% off coupon on the item page) - $0.65 (5% Subscribe & Save discount) = $10.38. Shipping is free with Prime or on $35+ orders.

• Note: You must be logged into your account. Coupons are typically one use per account. You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to an extra 15% savings when you have 5 or more items in your current monthly subscription.

Thanks to Deal Hunter phoinix for finding this deal.

Features:

• PetArmor Plus is a waterproof, flea & tick topical prevention for cats that kills fleas, flea eggs, flea larvae, ticks, and chewing lice for up to 30 days after application.
• Containing fipronil and (S)-methoprene, the same active ingredients as FRONTLINE Plus for Cats. PetArmor Plus for Cats has a powerful formula that starts to kill fleas within 24 hours.
• Unlike other flea and tick treatments that may temporarily suppress flea activity, PETARMOR Plus Cat Flea Treatment works by effectively breaking the flea life cycle Kill flea eggs and larvae to prevent re-infestation.
• PetArmor Plus for Cats flea drops protects your furry family members from brown dog ticks, American dog ticks, Lone Star ticks, and deer ticks (which may transmit Lyme disease).