My comment was not about the first generation produced by a pair purchased from a breeder. Thats why I stated "after a couple of generations they would become your lines". Your lines implies that you have been selecting the pairs to mate, not that you have done a good job at it or that your birds are getting a distinct look, merely that you have been making the breeding decisions and not the original breeder you bought the birds from. If you want to call it your birds or your flock fine. I don't call my breedings my lines either but they are my birds and my breedings, my success's and failures not the people I originally bought birds from.
Lanae