I've seen 4-5 (possibly more?) in a burrow before. We brought one home once, and sweetie raised it on a tiny bottle.momma cottontail built a burrow, should be 2 of them in that hole. had a cottontail do the same in one of my raised planting beds
That only seems to work if you get 'em before their eyes open though. Sweetie's daughter went back to that same burrow later and got one, and it acted crazy wild the whole time she had it.
YMMV.