Well this is upsetting. Our golden retriever died suddenly just shy of two years of age (very young) several years ago. She was fed Fromm Family Gold exclusively due to our breeder's recommendation. The food was expensive and I remember thinking how well she must be eating as it had so many kinds of meats and fat in it (including stuff like duck IIRC). Fromm is one of the brands listed by the FDA and golden retrievers are clearly hardest hit by this.
We did have a necropsy performed however it was inconclusive. She got a ton of exercise though as I took her to doggy daycare a majority of days during the week and our kid at home played with her often. Really sad that we apparently unknowingly did everything wrong (but with the best intentions) to ensure our dog died an early death. Fuck.
I am very sorry for your loss. It always sad to deal with the death of a pet, but it's especially hard when they're so young and it's so sudden.
I hope you will consider that this report is discussing early stages of research, not conclusive findings. I don't think it's fair to beat yourself up for "doing everything wrong" when there's still so much uncertainty.
We did have a necropsy performed however it was inconclusive. She got a ton of exercise though as I took her to doggy daycare a majority of days during the week and our kid at home played with her often. Really sad that we apparently unknowingly did everything wrong (but with the best intentions) to ensure our dog died an early death. Fuck.