Dog Food Analysis - Reviews of kibble
Try this website. Just type the name of the food into the search bar and it will come up with the star rating and other info for each. If I remember correctly there are several different kinds of each brand - from grain free foods (less chances of food allergies) to ones that contain some kind of grain in them.
I feed my guys - including my 7 month old dachsie pup - Nature's Variety Instinct. There's 3 variations and lots of options meat wise (vension and lamb being 2) of it, dry, canned and raw. It's formulated to be a rotation diet so that the dog isn't eating the same thing every day. I have no problems getting them to eat (small dogs of any breed can be picky) now. I ask them if they want supper and they beat me to the kitchen and wait patiently for me to get their supper.
I think the main thing for me when I used to choose foods for my guys was whether or not they would eat it...but you don't want to change foods drastically because it will upset the pup's tummy. I know I wasn't much help with this, but I'm slowly moving toward feeding my guys more of a raw diet - I'm seeing some wonderful results with them just being on the rotation diet already - and lots of people have mixed reviews about raw feeding.
Good luck!