I saw similar exchange with a Mink and her babies crossing a river once. It was cute and neat. Basically the mother parked them on one river bank and ferried one over, then one kinda Leroy Jenkins'd it and got swept away (he swam back but was like 10 feet downstream, no baby minks were harmed in the making of this story) the she dumped the first baby on the opposite bank to fetch Leroy Jenkins, then all babies simultaneously panicked and ended up in the water different places. She very quickly picked them all up and ended up on the bank where she started, and they all went back the way they came.