My 6 girls free range most of the time in my 1/3 acre backyard. Unfortunately their favorite spot is this small spot which we landscaped BEFORE we had the girls. There must be something in the dirt there that they've taken a liking to, because we go through this EVERY DAY........ they dig it up, I put it back, they dig it up, I put it back........... is there any kind of mulch that they really don't like? It's not like they don't have enough other spots that they could dig up!
