I have been feeding my dog Fromm's Gold for about a year and a half now. We had switched from Kirkland's Natures Domain which she barely ate and as a result was quite thin. We tried a few other foods that had decent ratings but we found out later were mostly Diamond products and she didn't like them either. Our local pet store recommended Fromm's as a quality company without recalls that made good food. My dog has done well on the Fromm's gold, she has finally filled out but remains healthy and lean. The problem is that when I started buying it at my local store it was $48 a bag and now its $57. Where the classic is more than $20 cheaper for the same size bag. Looking at the ingredients they seem the same to me except the gold has duck lamb and chicken where the classic only has chicken. Are there any other differences? Or are the differences worth the extra $20+ a bag?