They are a very active breed! Our family had a Dalmatian, "Marmaduke" who was stronger than you could believe! He had a particular dislike for the postman. On one particularly unfortunate day, Marmaduke was outside, chained to his metal house which in turn was staked into the ground. There was a horrendous noise and we look outside to see Marm running down the street pulling the dog house and all of the metal stakes!
I'd say yours has a few good years left - hope the two of you enjoy them!