My Mikey will be 5 in May, and weighs in at 150lbs. Calm down, he's considerably taller and relatively wider than the average golden. An entire head taller than my female. He's like the Shaq of goldens. But, yes, he needs to lose some weight. His diet consists of Purina Basic 9 (recently switched from Pro Plan sensitive skin - 3 cups instead of the 5+ stated on the bag) 2 glucosamine chews, 1/2 a pill pocket, a tsp of glandex for his foul smelling butt, and 1-2 teeny training treats. Bigger treats are typically carrots and whatever vegetable that he wont turn his nose up at. Vegetables are not a daily thing. He walks 1/2 mile most days. He's not very agile with his back legs, never really has been. He will NOT jump....even into the car. and when we try to push his 1/2 mile to a mile he'll kind of stumble. Not bad, usually just once....but still. So we try to keep him active, but in smaller spurts. He stayed solid at 130 lbs for a couple years, then made the jump to 150 within 6 months. I initially attributed to bullymake treats, (only 2 months) and immediately stopped it. A year later he's still at 150. I'll mention that he's also been on steroids for skin problems severl times in his life, including around the time of the weight gain. His thyroids were tested in 2016ish. The vet now wants to switch him to Hills, metabolic food. If we do make the switch, is Hills our only option? Has anyone been in a similar situation? Is a food change what we should be doing at this point instead of some sort of blood panel? Thoughts?????? If the food works, $180 per month to feed him alone will be one hell of a tough pill to swallow. I've got two more big puppers, naturally with their own issues.