What Is The Difference Between An F1 And F1B Dog?
What Is The Difference Between An F1 And F1B Dog? The number “1” stands for “first generation.” And it’s telling you that this is a dog bred specifically from two different parent breeds. The extra letter “B” in “F1B” stands for “backcross.” It means that the dog is a cross between an F1 Golden Doodle