Generations explained For the purposes of explaining this we will use a male Poodle and female Border Collie to demonstrate. Generation Description Percentages F-1 Poodle bred to a Border Collie 50% Poodle 50% Border Collie F1b Poodle bred to an F1 Bordoodle 75% Poodle and 25% Border Collie F2b F1 (50/50) Bordoodle bred to an F1b (75/25) Bordoodle 62.5% Poodle and 37.5% Border Collie F2bb Poodle bred to an F2b (62.5/37.5) Bordoodle 81.25% Poodle and 1875% Border Collie F3 or Multigenerational F1b (75/25) bred to an F1b (75/25)