So we collected a new puppy at the weekend, and he is really laid back, easy on the toilet training, has already worked out which cupboard has his food in.... he is a 10week old lab. Now the only issue is at the moment that he picks up stones, and twigs etc he can find outside, constantly… How would you tackle this in a puppy this young? My terriers never did this…, so I am in a bit of conundrum on how to make him stop? treats? a stern "no"?