Does anyone have an effective way to keep dogs from doing this. I have two dogs and both of them tend to dig holes. One of them has actually on more then one occasion dug up a cable line in our back yard. My brother has tried to put up a barrier around the line but this relentless dog still figures out how to get to it in order to dig it up and start chewing on it as well. I know that dogs digging is part of their natural behavior, but how do you keep them from digging in areas where you don't want them to? Any suggestions would be appreciated.