f1B

F1B is a designation used in designer dog breeding to denote a specific generational cross. In this context, an F1B individual is produced by crossing an F1 hybrid (the first filial generation, typically a cross between two pure breeds) with a purebred Poodle. The result is a dog that is genetically closer to the Poodle than to the other parent breed. This naming convention is common in doodle-type mixes such as Goldendoodles and Labradoodles, though it is not standardized across all breeds.

The typical aim of an F1B cross is to increase the likelihood of a curly or wavy coat with reduced shedding, given the Poodle's coat characteristics. However, coat type and shedding are not guaranteed, and outcomes can vary depending on the specific breeds involved and individual genetics. The percentage of Poodle lineage in an F1B animal is commonly about 75% Poodle and 25% of the non-Poodle parent, but exact proportions can differ with different breeding pairs.

Temperament and health are influenced by the traits of both parent breeds. F1B dogs often inherit a blend of the parent breeds’ temperaments, such as friendliness and trainability, but individual behavior varies. Prospective buyers should consider health testing, responsible breeding practices, and realistic expectations about shedding, coat maintenance, and exercise needs.

Variations of the term exist within a broader generational system (for example, F1, F2, F2B, etc.). Because the terminology is not standardized across breeders, it is important to obtain clear information about a specific puppy’s parentage, expected coat type, and health clearances when evaluating an F1B cross.