Please help us choose a title ASAP! (Patreon)

Tomorrow morning (in 16 hr) we're posting a video about how sled dogs are the best endurance athletes in the world thanks to a weird quirk in their metabolism...

And we need your help! Which title should we use with this thumbnail?

1. Why Can These Dogs Run Forever?

2. Why Don't Sled Dogs Ever Get Tired?

Please comment to say 1 or 2 (and why).

THANKS!

Alex