My Tipper will be 8 years old soon and has been eating Innova Adult. He is still a high energy dog and hasn't slowed down that much, except for that I noticed he didn't tolerate the summer heat as easily this year. Since both of the breeds he is made up of have a tendency to gain weight, my vet has always had me be very careful to measure his food, not too many treats, etc. to keep him at a healthy weight. I have noticed that he seems to be looking heavier lately and I reduced how much of his food I was giving him, which is much less than the recommendation s on the bag (which I know are just a guideline, but still). But I'm wondering if I should change his food to the Innova Reduced Calorie or the Innova Senior?