Yes you will need 1 female rat per snake to allow a consistent production.1) do those of you that breed them start small and expand from there?
Start small with 1.2 or 2.4 and build a strong colonie from there holding back animals from parents with the best demeanor and those producing the the largest litters. Never buy adult or proven rats to get started.
Depends on how many you plan on eutanizing at once and/or their size. For a good size rat cervical dislocation is an option so long you are efficient at it. Other option CO2. I use CO2]2) if or when you cull them, how does one do so humanely?
Anything euthanized means it is a surplus that will be fed later on.3) do you freeze for later?
BP are fed live, colubrids are fed F/T, I keep a few female BP on F/T for the surplus or feed females that have laid eggs F/T if I have a surplus.4) do you generally feed live? All of mine eat f/t and I'd hate to switch to live and then later have a hard time switching back.