I know everyone's got their own opinion on this but here goes. Right now, I'm feeding Dasher Purina Pro Plan Select Turkey and Barley for Senior dogs. I'm wanting to get him on better quality food. I'm considering going with either Canidae or Royal Canin. If I go with the latter, should I get their food made for Labs or would it be better to get the food made for senior dogs. Or, do you have a kibble you like better? Thanks. Oh, Dasher is 9 1/2 now.