F2-Generation. As just mentioned, F2 generations are the result of F1 x F1, or. F2 Labradoodle x Poodle (parent generation)=F2b Labradoodle. F3 - Generation/Multi-generation. In most instances, this is a catch-all for anything beyond the F2 generation. It can be the result of an F2 x F2 breeding, F3 x P-generation (F3b), or any other complex ...