Never seen one, but people talk about the Nutria as something that might do that. Brettski might have something there, maybe the metal was to stop it from digging anymore.

Armadillo?

Muskrat?

Beaver?

Woodchuck?

Ground Squirrel?

Prairie Dog?

Rabbits?

Badger?

Not sure what else digs a home into the dirt. Might need to find out what animals are in the area.

Eddie

Lake Marabou http://www.pondboss.com/forums/ubbthreads.php?ubb=showflat&Number=139488&fpart=1

It's not how many ideas you have, but how many you make happen.

3/4 and 4 acre ponds.