what is the max number of females/male?

is is possible to have 7 females with one male without issues? if not, what issues would one encounter, and what options would you have as far as separating pregnant females to a new group?

wont be a problem.

i keep between 3-5 per male and he gets them all pregnant at least once a month.

you wont have a problem as long as its not over crowded.

I never separate the males from females. i have back to back breeding's for about 4-5 litters then i feed off the female.

Wont be a problem. Ive had 1.30 before. I had two large tubs with about 15 females in them and switched the male in and out ( With tricks so they do not fight.) and from that id get around 200+ babys a month.