Is she an inside/outside dog? My shepherd dug holes when we first got him until we starting letting him come in the house so he is half and half now and has not dug a hole since. If she is trying to get cool then get a kiddie pool for her. I have also used cayenne pepper sprinkled in a hole too if the dog smells the ground before it digs. You need to find out why she is digging and go from there. I had a dalmatian that tore up our yard digging so I have some experience with this.