Both Thor (GSD) and Kona (non-GSD) have been on Nupro for about 6 months. Initially they both loved it, but will not eat their food now, if the supplement is on it. Went back to store where I usually buy all their food, supplements, etc. The owner gave me a brand new bottle to try and called the company to see if there have been any changes to the formula or if they have had any other complaints. No to both questions. I tried the new bottle, Kona refused it completely. Thor ate his food slowly the first time I tried the new bottle, then the second meal with the Nupro, he flat out refused. I loved the effect the supplement had on them, too many to list, but it was fantastic! Any suggestions for another whole food supplement to try? Thor has issues with grain, so both dogs ate on a grain free food. Thor also has what we believe are environmental allergies, but the Nupro seemed to alleviate them completely, so I am looking for a supplement that will help with skin and coat. Our dogs don't have GI issues, so a probiotic isn't my first priority, but I certainly don't have an issue with a supplement that has probiotics in it. Any advice would be appreciated!!!