I second Patty’s NutriSource recommendation. It does seem to be very easy to transition to for most dogs. Last year, I had to switch my Golden pup cold turkey and he had no problem. I used the Adult Chicken & Rice formula. It would be a big step up from the Purina One and then you’d be able to make the transition to the Acana much more easily.
Also, it’s a good idea to choose foods to use in a rotational feeding plan that are not only different proteins, but different manufacturers as well to avoid prolonged exposure to not so desirable ingredients and to add in beneficial ingredients not used in one particular food you like.
I have a Cavalier that can eat anything who is just over two years old and I don’t know if she’s ever eaten the same thing twice. My Golden has yeast issues and I have to be very particular about what I feed him, but am always trying new things for him to hopefully find another food that he does great on. Sam does best on Horizon Legacy and Canine Caviar and does well on a couple of other foods, but I’m always searching for another that he does great on to make part of his regular rotation.
