For kittens and cats up to 15 inch neck. Vet recommended. SettleDown. Sustained release pheromones proven to modify behavior. Recommended for problems such as: separation anxiety; destructive behavior; inappropriate marking. Breakaway collar lasts up to 30 days. Vetscription SettleDown pheromone collar for kittens & cats. Effective stress reduction for use both at home and on the go! SettleDown Pheromone Collar helps cats in fearful or stressful situations (separation anxiety, fireworks, thunderstorms, visitors, new kittens, new baby, vet visits, traveling). SettleDown Pheromone Collar provides a convenient alternative to diffusers which are limited for use in the confines of a designated room. SettleDown Pheromone Collar goes where your cat goes whether it is at home or on the go! How does it work? SettleDown Pheromone Collar mimics the pheromone that the mother cat produces to calm and reassure her kittens, and the lavender and chamomile provides a soothing fragrance. Cats recognize these pheromones throughout life. It mimics the natural way to help cats cope with new and fearful situations. Sergeant's is committed to providing high quality products. If you have questions or comments about this product, please write: Sergeant's Consumer Response, PO Box 540399, Omaha, NE 68130. For animal use only. In Case of Emergency , call: 1-800-781-4738. Non-Emergency, call: 1-800-224-Pets (7387). Visit us at: www.sergeants.com. Effective both at home and on the go. One third of all veterinarians feel that behavioral issues are as important as medical ones. - Source: Veterinary Forum, June 2008. Ask a Vet: How Quickly with the cat respond once the SettleDown Pheromone Collar is placed on a cat's neck? When the collar is placed the perception of the pheromones by the cat is immediate. However, as in every behavior program, the visible improvement in specific behaviors requires some time, depending on a variety of factors: the cat, the nature, duration, and severity of the problem, and behavior modification (cat and owner). Usually, an improvement in specific behaviors is seen during the first two weeks after wearing the collar, but some cats require a month to exhibit visible improvement. Pet Health Central: Get expert pet care tips from Pet Health Central on Facebook and Twitter. Testimonials: Our cat, Tiger, is very nervous around new people. When visitors come to our house, Tiger always hides under our bed. We tried the pheromone collar and he is incredibly social now! We are very pleased and would definitely recommend the collar to anyone! - Amanda, Omaha NE. Our cat is very scared to go to the vet. It is always very stressful for us when we go. I am so happy we tried the Vetscription Pheromone Collar. She is calm and relaxed and it has made our visits a much more pleasant experience. - Amy, Tampa FL. Made in USA.