"It is unclear how these racing dogs can keep running, despite heavy blizzards, temperatures as low as –40°F, and winds up to 60 mph. No other animal has been found to come close to the physiological attributes these dogs display."
The article goes on to quantify attributes that allow these dogs to perform so well, and for so long...
- Rapid adaption to exercise and the ability to sustain and recover
- Tremendous aerobic capability
- Ability to rapidly convert fat into energy
- Possible physiological attributes that enable endurance through high energy production and efficient use of energy
It's worth a read and may help us to make better bird dogs.