updated 06/23/2011 AT 10:45 AM ET
•originally published 06/22/2011 AT 4:00 PM ET
At 85 kgs., or 187 lbs., Sampson weighs twice as much as he should.
But the black Labrador from Australia, who has high blood pressure and fatty tissue around his head because of his condition, is too obese to be exercised.
Describing Sampson to be “the size of a small heifer,” a shelter worker who helps weigh him has said that the hefty pooch was fed too much of the wrong food.