One of the big arguments around for giving cats a grainless cat food is that cats are obligate carnivores, and their digestive systems just aren't built to handle grains. On that same note, how are fruits and veggies better? I don't know anything about what it takes to digest these. They also seem to be a popular ingredient in a lot of grainless cat foods... peas, carrots, potatoes, cranberries, spinach, tomatoes, apples, blueberries, etc. Are fruits and veggies something cats would eat in the wild?