[anonymous]

“The Purina-HA rx food had been fine, but I just figured that real meat kibble would be better for longevity and staying active as he ages?”

Not necessarily. The food you have chosen is high in fiber, therefore the bowl movements will be more voluminous.
Have you considered Purina Pro Plan Focus for sensitive skin and stomach?

More Nonsense from Holistic Vets about Commercial Therapeutic Diets