Both my Springers are turning 9 soon-Jake in December and Jesse in April. Right now they are on Purina Pro Plan Focus Sensitive Skin and Stomach and are doing very well on it, other than some dry ski...
Pawz & Doc, that's always been my line of thinking but I've read that too much protein isn't good for older dogs. My coon hound ate crappy food (it's all he'd eat) and I never changed it. He lived to 12 with no health issues at all.