[Jenny]

Isabelle still os ocasionly eats rock & she's 7. With her it's a a lack of mental stimulation thing. She did it when she was a pup. Luckily she's never eaten enough of them to get sick. She poops them out. She likes tiny gravel. I find that if she get lots of exercise she doesn't bother with the rocks. If a day or so has passed and we haven't gone for our walk then the eating of rocks can start, but that usually after the digging. She definately lets me know when she's bored!