I have a stocked one-acre pond that is 2 � years old, no dam just a one-acre hole in the ground. The pond sealed itself two years ago and has held water just fine, for no apparent reason the pond has started leaking at the rate of about 2� every three days, this has been going on for six weeks now, at this rate I will lose my fish in 6-8 weeks. I�ve been pulling my hair out trying to figure out why it�s leaking and yesterday while walking around the pond looking for clues I seen what looked like a baby beaver swimming across the pond and disappearing in a clump of cat tails. Could the beaver be my culprit?