We just adopted a 5 year old Jack Russell Terrier. He is the best thing that ever happened to this family. We have had other breeds in the past but this has got to take the cake. I think they are the one of the most intellegent dogs I have ever known. This guy is so funny every time we have Animal Planet on TV he runs up the screen and trys to attack it or any animal for that matter. I have even witnessed him watching Telivision for long periods of time. What a hoot!!!