Woody Taylor

I'm switching Annie over to straight Evo and off of the Innova puppy. She's got a twitchy stomach and I know Evo is rich, but I'm trying to strike a fine line between clever and stupid on switching out foods. What ratios work best for you all? Something I should blend in over a week? Two weeks? Etc.? I know a few days is too restrictive but I'd think her body would adjust relatively soon with these types of food, right? (i.e., Evo is high-protein but isn't a food like Innova puppy relatively rich itself?)

I started with a 1 scoop Evo : 2 scoops Innova last night and feed twice daily. No yard pudding yet.