My Penny, who is now 10, was diagnosed last June. I took her to my regular vet because she wasn't eating well, sometimes skipping a meal altogether. So unlike her! Vet noticed a heart issue immediately, so off we went to the canine cardiologist the following day. $900+ later, we had the diagnosis. I have been feeding TOTW Pacific Stream for several years, not so much because its grain free, but because after trying 4 other foods, this was the first one that didn't give all 3 of my dogs crystals in their urine. After much thought about this, I've decided to stay with it, but augment it with whole grains. Its oatmeal for the next few days, then whole grain rice, then maybe couscous. I have no idea if this will help my other two, but it makes me feel a tad less guilty. Penny is stable and doing well on her meds and supplements.
Funny aside: Penny is a very insecure girl, unhappy in strange places, especially if one of my other dogs isn't with us. The cardiologist is part of a big specialty practice, and, since we went in as emergency, we had to wait several hours in the waiting room. No matter where you sat, you were in line with either the front door, the check-in check-out desk, or the entrance hall to the exam rooms. I chose the furthest point, but was still near the hallway entrance. Well, Penny was very nervous. Penny had an upset tummy. Penny had gas. As people went past us, all of a sudden they would stand up straight, throw their heads back a bit, and kinda stutter step. One dog even threw his head up for a better sniff. I would just kinda shrug and smile. Poor Penny.