I've never raised mine on the Performance, but I can say that I have used the Pro Plan Regular Puppy Chicken and Rice for many litters and love the results. I gradually switch them starting at 4-5 months to a mixture of Performance and 4-Health Chicken and Rice Adult sold exclusively at Tractor Supply. They are growing quite evenly and have not lost bone.
I have raised puppies on both formulas and prefer the Performance, nice bloomy puppies, keep their bone, lots of calories and fat for growing babies, and the plus is I can feed everyone the same food.