Hi BarbLovesDogs, my first question is, do you know what breed your dog is? Is he large or small? One of the many unique things with dogs is that every breed and size of dog develops from puppyhood into adulthood at different ages. Typically, larger dogs take longer to reach adulthood than smaller ones. But another consideration is the type of breed you have in terms of chewing. Some breeds are much more prone to chewing (and even ingesting slippers and other foreign objects) into their adult years. Can you share more information?