These have squeakers in them. One in the body and one in each front paw. I have two adult boxers, medium size, and often a squeaker doesn't last for more than a month or two. My girl sniffs out the squeaker, and then grabs it and will squeak the toy around 100 to 150 times in a row. She does it carefully and gently, but continuously. Her nubbin tail wags the entire time. She just lays there happy as a lark after. But most squeakers don't last too many months with her enjoying doing that up to 3 times per day, every day. She actually cries if there is no squeaker toy down to play with.