Originally Posted by sirdoofus

Not saying this is right, but if it were me, and I was planning on overwintering indoors, I would leave the pups for separation next year. Probably ok to do it now but my experience is small pups that are not well establish don’t always over winter easily. But of course that depends on where/how you are doing it. If you have a bright, warm indoor space in which they will actively grow, then less problematic. If a cool garage or someplace similar, more difficult. And I have found the pups seem to establish more quickly in the spring. But that is me with my admittedly limited experience.