I would like to see a photo of your dog to be sure of my repsonse.
One of my male pitbulls is 60 pounds currently. This is because in the winter I increase his feed. In the winter he gets 2 cups of (Diamond dog food) or Nutro Max for breakfast and for dinner he gets one cup of raw meat and one cup kibble at night.
In the summer I feed him one cup of kibble in the morning and one cup raw meat at night. Throughout the day I usually give raw chunks of meat as treats one XL milk bone. (I give the same treats in winter.)
He naturally burns off 5 to 7 pounds and tucks up nicely. He goes from solid to lean, perfect for hot weather.
My dogs are very active regardless of the weather and I never had an issue with increasing the feed somewhat. As long as the dog is still active it burns off or settles nicely. Some people like the solid look compared to my lean preference; that is fine. Long as you don't have to push firmly to feel the ribs.
Hope this comes through.