My two sister pups are now 6 months old but have spent all summer digging up the garden , chewing twigs, leaves, bulbs and plant leaves, initially I was worried sick about them eating the wrong things, but (touch wood) at the moment they are fit and healthy, we did fence in an area close to the house for when we are unable to keep an eye on them, so they can go out onto a flagged area and not chew anything , this area as a been a boon and is ideal if too busy to keep a close eye on them