One other thing I forgot to mention, and I'm now wondering if this has something to do with the change of ownership at Nutro...her waste is a LOT bigger in the last couple of months. This is another reason why I'm wondering if she'd do better on something else.
They probably changed the formula and it has a lot more meals/fillers in it. That happened to me with Canidae when they changed their formulas.
I don't think canines are really that bad off not having meals at regular times--they're carnivores at heart, they eat when they can.
I remember "curing" my friend's purebred puppy of a poor appetite (they decided free feeding was best, which quickly devolved in to HAND-feeding) in one weekend. They were AMAZED how the critter ate ravenously after missing a couple of meals. No way I was hand-feeding a dog!