My four old mixed breed female is looking for work as an excavation specialist. My yard looks like a mine field. She doesn't bury anything, just digs holes. I live in florida and thought it might be related to keeping cool, but thats a guess. I have tried stones in the hole (she digs elsewhere), burying moth balls (she digs them up and sells them 2 for a quarter so she can buy food for energy to dig more holes), fussing at her, and trimming her nails short. I know this is a common problem, but any help will be appreicated. Thank you in advance. Jerry B.