Cooper is one of those dogs who in the past has had no problems switching from one food to another. With impunity. No mixing, nothing. We are back on the rollercoaster because his anal gland issues were just ridiculous while on the Purina One Sensitive (fish based) - and I admit it, we had a coupon for BB and had tried the sample pack, and the ingredients looked good, so here we are.

Because the BB is better food, should I be more cautious this time and mix? How different is the food than the Purina One, really? I realize it isn't a grain free like Evo (which I would definitely do a transition over time with) but I think it is most likely a significantly higher quality than the Purina One. What do you all think???