What kind of bedding is it? Sawdust dosn't sound good, unless maybe it's aspen. Any soft wood bedding i.e. pine cedar is harmful too them. Most likely tho' they are just getting used to their new surroundings. What are you feeding them? And of course WHERE"S THE PICS?? Don't ya know we are cute rattie pic junkies around here? LOL Good luck with your new girls!