This pair of geese only had two babies (the other pair on the shore had 10 to watch over) and they were having no trouble keeping them in line - though the rear one does seem to be pushing the parent along :)
Sadly a lot of the babies don't make it - snapping turtles, big fish, other birds, dogs, etc. seem to like the little ones. It's always sad when I count a group and then go back the next day and their a little less :( Way of nature though ...