The interest in animal hybridism was for a long time chiefly of a practical nature. An example of ancient hybridism is the case of the horse and donkey creating a mule, which is primarily used for transportation and heavy pulling. Animals in the panthera genus are well known for being able to procreate together, creating countless hybrids, like ligers and leguars. Hybrids are often created in dog breeding to create new cross-breeds. People often mix different dogs with poodles, because of the poodle's temperament and the fact that it does not shed its fur. Popular poodle hybrids are goldendoodles, schnoodles, cockapoos, and labradoodles. An example of a non-panthera cat hybrid is the savannah, which is a cross between an African wild cat called the serval and a domesticated cat.