DULUTH, Minn. (AP) — Before sled dogs can compete in this year’s John Beargrease Sled Dog Marathon, they have to be cleared by vets to ensure they can handle the race.

WDIO-TV reports that University of Minnesota students who are studying to become veterinarians gave the dogs check-ups on Saturday morning.

They checked the dogs’ heart rates, lungs, and any issues they might have on their feet.

Beargrease head vet Gregg Phillips says the check-ups are a great experience for the students, who will take care of the dogs throughout the race.

The Beargrease starts Sunday.

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