I'm so sorry, so sorry to hear of your precious Labbie's untimely passing
I've had Labs my entire life, work in Lab rescue but have never heard of heart failure, especially in young Labs, being common to the breed. My heart breaks for you as I know how your heart if breaking. What a beautiful tribute to your beloved Izzy, your brown haired girl wth golden eyes, your Isabelle Raine,
your Izzy of Sunshine. How blessed she was to have you as her forever Mom. For sure your baby girl has earned her angel wings and is watching over you from the Rainbow Bridge, sending you her love. My heartfelt sympathies to you and your family. Never forget she waits for you at the Rainbow Bridge, reveling in every flower, every tree, every butterfly wing, patiently awaiting that joyful day when you and she will be reunited in love, forever. You will see her again, you will.
{{{HUGS}}}
Love, Sandra and Star