Hi everyone. Our 4 month old shih tzu puppy Max is constantly picking up stones, sticks and rubbish whilst outside. This is both out in the garden and going for walks. He is so near the ground he has got them in his mouth before we can stop him. Walks are becoming a nightmare as we try to drag him away or get his mouth open. We have already had one expensive trip to the vet when he couldn't pass a stone and tonight he has been sick 5 times, bringing back stones. We are despairing. Would a muzzle help? Any thoughts/advice welcome.