Ahhhh... the joys of picky dogs.
It took me forevverrr to find a kibble Jackson AND I were satisfied with. He was around 8 months old, I think, when we found Nature's Variety Instinct. He
loved it! Totally great food for picky eaters, from what I've read, and the kibbles are really small so good for the little guys. I found my 15lber practically swallowed them whole, ha. He gained a little weight on the NV, but I was probably just over-feeding. Otherwise, he did amazing on this food and I wouldn't hesitate to feed it again.
Currently, he's eating Acana grain-free and totally loves it.
He used to wait days before touching dry kibble if it was just sitting out (I'd have to mix wet food, which I still do for rotation/flavor/etc) but with the Acana, if I put it out around 5pm just dry, it will usually be eaten by 7pm. He seems to really enjoy it.
In general, I really really really think Orijen and Acana are some of the best kibbles out there. I also like Go! Endurance (by Peturcuan dog food) and Fromm (also tiny kibbles).