My springer loves to carry stuff in his mouth. When he is out running he picks up anything, a bumper if allowed, a piece of cut lumber, a stick and unfortunately rocks from the driveway. Most items don't bother me much but the rocks have to stop! He doesn't seem to chew on them or anything just likes to have one in his mouth. I have been taking them away and scolding him but it doesn't seem to be sinking in very well. I am sure there are tricks out there and I am more than open to hearing them!