Simplify the following text for a Grade 6 native English-speaking person.
Original: A ten-dog team of Seppala Siberian Sleddogs in tandem hitch on a frozen Yukon lake ( Photo by Isa Boucher ) Several distinct dog breeds are in common use as sled dogs , although any medium-sized breed may be used to pull a sled .
Simplified: Several distinct dog breeds are in common use as sled dogs , although any sized breed may be used to pull a sled .