I hear ya! Finding something that these little guys like that is good for them isn't easy! I switched from Science Diet puppy little bites to the Nutro, natural choice for puppies and my guys wouldn't eat it at all, so I went to Eukanuba, they wouldn't eat that, so back to Science Diet and they've been eating it good for quite a while now. I thought about Solid Gold or Innova, but couldn't find it here locally. Also, I leave their dry food down all the time, but that's mainly because I have a small yorkie (I can't say he is tiny anymore after seeing the pictures of Rupert, the yorkie) and I don't want him to get low blood sugar. My bigger yorkie has not gotten overweight though from the free-feeding, so I think it is okay to leave dry kibble down. I don't feed wet because it gives them loose stools and we're still ironing out the potty training!
I don't know if that helps you any, but I just wanted you to know what worked for me.