why would you want to use a dog for few month or year if it's doing everything you ask of it just to get a new dog and start the same scenario all over again ? Me personally I would never get rid of my dogs if there doing what's asked of them and they are enjoying there work. If you only breed a line to suit your work then why a month or year later get rid of the dog? Understand if it don't make the grade and everyone has different expectations so your plodder , Jacker what ever it might be could be someone's pride and joy vice verser. Edit to add your a peddler! Ha