At 6 months she's probably ready to cut back to 2 meals per day. They often wean themselves from the 3rd meal
She can either go on an adult diet, or can stay on puppy for a few more months
As far as what to feed, you'll probably find as many answers as there are dogs!
My own personal opinion: I don't like the fact that Autarky lists corn as it's first ingredient (even though they are calling it maize, it's still corn
) Corn, wheat and soy are often culprits in food allergies. I'd much rather see meat as the first ingredient, with rice or potato as the carbohydrate. Also don't want to see any glutens (wheat or corn), it's basically the junk left over from milling the grains
Take your time, research it, see what other people feed whose dogs look sleek and healthy