It would really depend on what that person is like they may they may not.
Each owner is different. The best thing to do is to read some books that have been written on the Iditarod race. They will tell you lots about what these owners/trainers go through with their dogs such as the breeding, care of, feeding of, & how they care for their dogs during the race.
The Bolder Boulder sporting event is a race. This race takes place every year in the USA on Memorial Day. There are also events that one can check out after the race.
France
The maximum number of dogs you can run in the Iditarod race is 16 dogs
The fewest dogs you can run with is at least 10. At the start of the race you must at least has 12 dogs in order to start the race
boat race
contest sporting event
16 dogs
The Sydney to Hobart Yaght race.
The oldest sporting venue in the US is Saratoga Race Course.
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12 dogs