KONG Squeezz Ball - Amethyst - Large 100% SAFE & EFFECTIVE: Veterinarian-recommended our ea and tick prevention for dogs. Our dog flea collar kills eas and ticks on contact. No biting is required POWERFUL PROTECTION: Flea and Tick Collar for dogs protects your pet or puppy from flea and ticks 24 h/7 days a week for 8 months. WATER-RESISTANT. Eco-friendly, nontoxic, non-greasy, and odorless dog flea collar. A new formula in 2018, which includes Natural Essential Oil. 100% waterproof dog collar will be effective after swimming, bathing, and playing in the rain. NO ALLERGY. The effect of our flea prevention are based on the protective properties of herbs. The flea tick collar is safe and does not contain components that cause allergies in dogs. ONE-SIZE-FITS-ALL DOGS. Our flea collar for dogs was designed at 25 inches to fit all siz