Every dog I ever had since I was child had a these treats. There are made out of some sort of rawhide and dogs just love them, mine included. They are great for dogs that like to chew on everything and great for teaching dogs fetch. They have no flavor added and they are made very well and solid. They seem to last quite a long time too, not like some treats where they eat them immediately. My dog would sit there for what seemed hours chewing on this and slobbering all over the place. I liked using these in the yard to teach my girl how to catch and fetch. One thing with these treats though is that they can cause one heck of a mess. As the dog chewed on it the treat itself would almost melt and turn into a slobbery mess that seemed to stick to everything. I used to try to grab them before that happened and toss them but my dog usually was faster than me. Best thing is to let it harden back up and then pick up the mess.