Simplify the following text for a Grade 5 native English-speaking person.
Original: Sled dogs have become a popular winter recreation and sport in North America and Europe ; sled dogs are now found even in such unlikely places as Germany and Japan . Several distinct dog breeds are used as sled dogs , however , dog drivers have a long history of using other breeds or crossbreeds as sled dogs .
Simplified: A team of sled dogs may consist of anywhere from three to two dozen animals .