you cant breed the kinked ones... but those kinks arent life ending. honestly you could keep them as pets or sell them to someone for a pet, but i do not believe that will effect its well being... if you do want to put them down though, alot of people put them in the freezer and there bodies just slow down until their heart stops... or you could also us C02 to kill them the most humane... looks up how to make a C02 chamber with a pop bottle... its pretty easy and you can use it on rodents as well!