When our girls were 8 & 10, we got a mixed breed puppy - cocker spaniel & black lab. Cute little thing grew up to 35-40 lbs with black Curley hair. Best temperament of any dog we ever owned. She trained easily and we could leave her in the back yard for hours in our development and she never would leave. When she was about 1.5 years, we went away for the afternoon. When we came home, we found a hard cover public library book with the cover chewed up. Paid for a new book at the library. Over the next year, someone would forgot to put hardcover books up when we were leaving - and she chewed $200 of public library hardcover books. Our vet said it was anxiety over us leaving and horse glue in the bookbinding. Then she quit doing it just like that. For 8 years never chewed another book - until she was 10 years old and chewed one more. Just 1. At age 13 I got up one morning and she went to stand, and couldn’t. Took her right away to vet and she had had a stroke. Sad, sad day as we made the decision to put her asleep.