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)