Sentry Advance Guard 2 is a once-a-month topical treatment for fleas on dogs. Waterproof formula starts working through contact. Kills fleas, flea eggs and flea larvae. Kills existing fleas within 12 hours of application, before they can lay eggs and kills reinfesting fleas within 2 hours. Same active ingredient as Advantage II.
Quantity: 4 doses
Small: for dogs 3-11 pounds
Medium: for dogs 11-20 pounds
Large: for dogs 21-55 pounds
XLarge: for dogs 55 pounds and up