Yukon Quest dog’s heart stopped

Final results of a necropsy performed on a dog that died during last month’s Yukon Quest Sled Dog Race are in.
Yukon Quest head veterinarian Nina Hansen said veteran musher Yuka Honda’s dog Firefly had an enlarged heart.
“And likely died of a sudden arrhythmia,” Hansen said. “So the electricity going to the heart would have gone wrong.”
Hansen says many sled dogs have enlarged hearts and live normal lives, while a few die suddenly. She says it appears Fir