sentences:  While the DNR could not do anything about the frogs, they sent the information on to David Hoppe, a herpetologist at the University of Minnesota Morris campus.Hoppe was unable to come to the Bock's lake until October, because of previous commitments.When he did manage to go to the Bock property, Hoppe was very surprised, as the Bocks lived on a relatively large natural lake, rather than on the small farm ponds where others had reported deformed frogs.