Mine were on Fromm for a long time and one of them got sick enough to go to the vet, then the second one got sick and I tossed the food. Not sure if it was the food, but I've had no problems since I switched them. They are on a grain free, salmon and sweet potato food and all are doing very well. The protein and fat are not as high as the Fromm was. I think finding that balance is pretty important. I also stay away from chicken, wheat, and corn.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD