A Goldendoodle is a dog crossbreed bred from a Golden Retriever and a Poodle, their name is a portmanteau of Golden Retriever and Labradoodle. Whilst primarily bred as companion dogs, Goldendoodles have been successfully trained as therapy dogs, guide dogs and other forms of assistance dogs.Goldendoodles were first bred by designer dog breeders in the 1990s in the United States where in some regions it has become one of the most popular dog varieties, although deliberately breeding poodles with golden retrievers preceded this, an example is Monica Dickens who crossed the two breeds in 1969.The original aim of the Goldendoodle’s breeders was to produce an alternative to the popular Labradoodle from which the cross takes part of its name, the cross can result in a healthier animal than both parent breeds, hybrid vigour reducing genetic issues found in both. The cross scored lower in owner-directed aggression than golden retrievers but similar levels to that of a Standard Poodle, lower dog rivalry than either of its parent breeds, but scored higher than both its parent breeds in dog-directed aggression, dog-directed fear, stranger-directed fear, and touch sensitivity. Goldendoodles were reported to be more trainable than both the Golden Retriever and Standard Poodle. A Goldendoodle can be bred from any one of the Toy, Miniature or Standard sized Poodles, the resultant offspring coming in three sizes. The miniature Goldendoodle typically stands up to 20 inches (51 cm) and weighs 15 to 35 pounds (6.8 to 15.9 kg), the medium Goldendoodle typically stands 17 to 20 inches (43 to 51 cm) and weighs 40 to 50 pounds (18 to 23 kg) and the large Goldendoodle typically stands 20 to 24 inches (51 to 61 cm) and weighs 50 to 80 pounds (23 to 36 kg).