when i left the man said that he 'took the boy out too late so they're pregnant again, if you want any more they're due in 2 weeks'

here's a photo of one of the boys so you can see how small they are:

and here compared to a normal sized rat:

i've popped them in a cabrio cat carrier for now and even that swamps them. the smallest cage i have is a tom cage and i'm scared to put them in in case they a) get through the bars or b) fall and injure themselves. its a huge drop for such a tiny animal. they look so fragile i'm apprehensive about picking them up. they're friendly little things despite their bad start in life. should i risk popping them in the tom or keep them in the cabrio?