Goldendoodle Coat Types
F1-

A first generation hybrid Goldendoodle is the product of a Golden Retriever and a Poodle. As first generation hybrids, these dogs have the added health benefits associated to Hybrid Vigour. This is a phenomenon in animal breeding referring to the fact that the first cross between two unrelated purebred lines is healthier and grows better than either parent line.
Coat Maintenance: moderate to high care
Coat Description: Coat grows to a natural body length of 3-5 inches which requires combing and occasional grooming. Many choose to have the fur cut back once every few months to keep the fur shorter and easier to maintain. Coats are usually wavy or curly, with a rare shorter hair coat.
Shedding: mostly very light to nonshed (see the stats in the Dood Database)
Allergy Friendliness: usually successful in families with mild allergies. When a family has moderate to severe allergies, a backcross Dood is recommended.
F1b-

A backcross pup is the result of a hybrid bred back to one of its breeds of origin. From a genetic standpoint a backcross pup is a first generation cross. As breeders are breeding towards nonshedding and allergy friendliness, a backcross Goldendoodle is generally the product of a Goldendoodle bred to a Poodle. The resulting dog is, on average, 1/4 Golden Retriever and 3/4 Poodle.
Although there is less vigour in this crossing than in the original hybrid, the first generation backcross still is close enough in the breeding tree to benefit from hybrid vigour. With each successive generation vigour is lost.
Coat Maintenance: moderate to high care
Coat Description: Coat continues to grow in length although similar in appearance to a first generation Goldendoodle. Coats are wavy or curly.
Shedding: very light to nonshed (see the stats in the Dood Database)
Allergy Friendliness: recommended for families with moderate to severe allergies.
F2-

A second generation Goldendoodle (F2) is the result of a Goldendoodle bred to a Goldendoodle - and there are very few of these actually bred as the second generation hybrid is genetically the most varied generation possible. (see study below on wolf-poodle hybrids) When breeding on, most Goldendoodle breeders breed a backcross instead, as the pups are more predictable, and work well for people with allergies
Coat Maintenance: varies on the coat type
Coat Description: The coat can be a hair coat, wavy coat, or curly coat.
Shedding: varies greatly from shedders to nonshedders
Allergy Friendliness: not recommended for families with allergies, due to the varying coat types.
F2b-

A second generation backcross pup (F2B) is the result of a Goldendoodle (F1) bred to a Goldendoodle backcross (F1b). Although three generations in the making, F2Bs are technically second generation dogs.
1st generation pup - Golden Retriever x Poodle - F1
1st generation pup - Goldendoodle x Poodle - F1b
2nd generation pup - Goldendoodle backcross x Goldendoodle - F2B
Although there is less vigour in this generation than in the first, the second generation backcross still is close enough in the breeding tree to the original hybrid to benefit from hybrid vigour. With each successive generation vigour is lost.
Coat Maintenance: moderate to high care
Coat Description: Coat continues to grow in length although similar in appearance to a first generation Goldendoodle. Coats are wavy or curly.
Shedding: mostly nonshed
Allergy Friendliness: recommended for families with moderate to severe allergies.