The F1 hybrid is the cross between the Poodle and the Labrador Retriever OR the Poodle and Golden Retriever. The resulting dog will be 50/50 Poodle and Retriever. In other words, an F1 Labradoodle puppy is 50% Labrador Retriever and 50% Poodle, and an F1 Goldendoodle puppy is 50% Golden Retriever and 50% Poodle.
The F1B is a ‘backcross’ meaning you take an F1 Goldendoodle puppy or F1 Labradoodle puppy and breed it ‘back’ to a poodle. This puppy is suppose to be 75 % poodle and 25 % lab however, that is not always the case. It depends what genes they inherit.