Lucky's vet gave us a copy of a recipe for home cooking from a vet text book - if you want to PM me your email I address, I would be happy to send you a scan of it. You have to measure it out in grams and the recipe is for a 40 lb dog so you'd have to adjust the portions accordingly. It's very flexible in terms of veggies, proteins and carbs.
All that said ... I've got Lucky on Evo and Pumpkin. So far so good and there are no grains to get stressed over for now.
Hope your guys are doing well!!!
(a.k.a. Lucky's & Sparky's mom!)