Help

[Cerra]

Not urgent, but I was wondering if I could remove the litter of 6 (now 4
weeks old) one by one and put them in with the six week olds. I want to
do it gradually so that the three six week olds don't get
overburdened(sp.). My main question, I suppose is will the four week
olds mature properly? And does anyone else see any other complications.
Thanks c.