Things happen. I have no problem with breeders, if they decide they want to keep it, it's theirs to keep. It's not like they sold it to you and then reneged, no money exchanged hands, next time you decide you want something buy it and then get it sexed cause after you buy it it's yours.
How many times have you heard about buyers changing their minds about buying something? Surely a seller can change his mind about selling something.