I have 2 dogs....one about 3yrs old (guard dog-heinz57) and a beagle pup about 9 mo old. I feed them the best commercial dry food I can find, and fortify it with pork, chicken, and fish bones about 3 times a week.....they are both in beautiful shape, but I must be careful to not overfeed the beagle.
You know them....they don't know when to stop.