Cut out all the treats and cut his food back by about 20% until he's down to fighting weight.
There is also a great ear med you can get over the counter, Amazon carries it, called Zymox. I keep it on hand and have found it does a great job.
Thanks for the tip on Zymox. I have that on hand now. He us eating the minimum for dogs over 100 lbs in a high quality food. I have to fight with my husband and MIL about table food constantly.
Great Pyre adults are couch potatoes. Even the working dogs. They sit somewhere and watch. They dig a hole to conceal their bodies with just their heads showing and watch. Take Atticus to the dog park, he does a quick circuit and then chooses a vantage point to watch. He only abandons his watch to break up fights. He asks to go out, not to pee or poop, but to take up a watch position to make sure the neighborhood is safe.
We were walking a mile a day until he suffered a paw injury. I bought him boots, but they only fit his front paws. I special ordered a custom set. The pea gravel on the Fit Trail we were using really did a number on his paws.