so since it seems like our community has a knowledge base for everything i need some help!!! i have crawdads digging around my spillway of my pond. in fact they had started the pond to drain. i have tamped their holes and tried to weed all the rocks and things out to deter them from being in the area. nothing works!!! the are draining my acre and half pond, its down a good 8 inches, my spillway pipe has even dropped!! any idea of how to get rid/kill/deter them. i have tried salting the area and even killed all of the grass. i even chlorinated the water to see if that would drive them a way to no avail!!! please help me!!