Some good foods are Wee Bits by Solid Gold, Wellness Super 5 Mix for small breeds, Innova, Natural Balance for small dogs, Canidae. Some good raw foods are The Honest Kitchen, Stella and Cheweys, Nature's Variety Raw Medallions. I try to limit canned food due to bpa in the plastic lining and give lots of fresh fruits and veggies. There is a wealth of nutrition information on previous SM threads also

.
Ingredients to avoid
http://www.quantumhealth.com/news/articledeet.html
bpa in canned foods
http://www.riverwired.com/blog/bpa-dangers...reater-plastics
You may want to check out the book Scared Poopless, I think it could save a lot of precious dog lives.