More: Jethro is a fun loving adventurous 7 year old rat terrier who likes to hike, catch frisbee, wrestle and chase other dogs, and always wants to be doing something. He mastered the frisbee in one day, the obstacle course at the dog park in a day, figured out how to open the latch on his crate, and is the smartest dog we ever had. When Jethro is not doing something active, you will find him in our backyard sunbathing here in Scottsdale AZ.