I have two 8 week old rats right now that i brought home yesterday but I have a huge double critter nation and was wanting to get two more (especially since my old mischief consisted of 4 boys) These two are from a different breeder they opened their eyes a few days ago the breeder says they are about 3 weeks and they that should be ready a week from today to come to their new home. I feel like they should at least by 6 weeks but if he is separating them from mom at that point anyway. Do you guys think they will be okay? Any tips????