Innova vs Canidae vs Wellness vs ???...

[tpa232]

...All great foods, I know ... but I'd appreciate your feedback on what's better (best) in your opinion and why. I feed Tyson Wellness, but I'm recently given to understand the very best way to go (leaving raw out of the equation and just focusing on dry for this post) is to find 3 or more high-quality foods and constantly switch between them (75/25 for a few weeks, 50/50 for a few, 25/75, and then a month later, repeat). The argument is that canines are used to a somewhat varied diet and could benefit from minerals, vitamins, etc. food "x" provides that food "y" may not.

I'd just like to do the best that I can for Ty and, though I've spent many hours researching food here and outside the forum, am having a tough time finding meaningful differences between these three foods.

Would also appreciate your opinions on the "switch" theory...

Thanks all,
Tom