Official exclusive Double U Hunting Supply Bobcat Dog training scent. This scent comes in 2oz and 4 oz bottles. We've spent a lot of time coming up with a scent comparable to Grawes. Due to supply issues, we no longer carry Grawes Scents. We know how important good training scent is and have contracted with a company to develop a good training scent. We have used the Scent before with young dogs and these are the best at actually working getting a dog to work a Track and teaching them to Trail. Be Sure to Read a Great Article about how to train using these Scents on one of our child websites by Mike Leonard from New Mexico. This is a Really helpful article http://www.biggamehoundsmen.com/CatTraining1.php Like Grawes scents, Double U Scents are also not Urine based scent, so availability can be limited by production.