It can be one of two things. Either something is bothering him, and this is how he's expressing it OR he really did acquire some form of dog anxiety. If you take him in, ask for a full checkup, maybe some blood work, and bring a stool sample. I know that there is bully prozac @brutus77 gives it to one of her boys, and it has really helped. Before going there though, double check and see what the vet says. You know Frank, and if you know this is not normal behavior for him, I would get it checked out. I don't think the cuddle/following around is something they grow out of. Tyson is 9, and if I stop too short he'll run into the back of my knees, and must always be right next to us.