He's gorgeous buth he does look a little thin to me. I don't feed my dogs vegetables, just their dry kibble. I have recently switched to the grain free version of 4Health. Mine eat the whitefish and potato and really like it. Your Zeno is almost one year now, so you could switch him to adult food, but I would find a dry food that he likes and that you are comfortable with. If he doesn't want to eat, a trick I have used is to put a spoonful of lowfat cottage cheese on the dry food. For some reason most dogs can not resist cottage cheese and they will eat their food quite well if you mix some in.
Good luck!