You know, the best food in the market today, in my opinion, is the one made by PHD Products, check their website at: www.phdproducts.com. My dog was very sick and now is doing great, in addition I give her a "raw diet". You can read all about it there too.
A good source of information is this book:
"Holistic Guide for a Healthy Dog" by Wendy Volhart, which I highly recommend.
Good luck !
MRosa |