I slowly changed Barron to Innova using the following formula:
I initially started by giving him 10 kibbles, and then 20 kibbles of the Innova to his old food the first two days. Then...I gave him 1/4 cup of the Innova to 3/4 cup of the old food for 5 days, and then increased the Innova to 1/2 cup to 1/2 cup of the old food for 5 days, and then increased the Innova to 3/4 cup to 1/4 cup of the old food for 5 days, until I made the total switch to Innova. Barron adjusted beautifully to the Innova and currently has a healthy and shiny coat :D