Three weeks?

Joe has been here for three weeks now and I think he quite likes it here, he seems to have settled in well. Apart from taking a few liberties here and there he is beginning to realize that I AM THE LEADER OF THE PACK - sometimes! However, he does "try it on" - and sometimes gets away with "stuff"! I can't believe that, at my age, I am chasing a dog around my living room trying to retrieve a sock that he has picked up; he runs around the sofa - I think he thinks it's a bloody game!