I would also be interested in the answer to this question. My pup had an F1 mom and a 7th gen Australian dad. The breeder told me my pup is considered an F2 Australian. Not sure if that is correct or not?
You go up one generation from the lowest generation...no matter how multi the multi is. :wink: You drop the B (and don't count it as a generation up, for instance F1xF1B + F2 (same as F1xF1=F2)
So, F1B x multigen = F2
At least that is the way I understand it...I do know that some breeders call their pups multigen if they are beyond the F1 (I think that is a marketing decision that might bite them in the butt someday.)