It can be a form of separation anxiety. But, especially with young puppies, remember that they are raised in a litter, and they have no experience with being on their own at all. This drive to connect with another being is part of the reason dogs and humans have such a great partnership. A pup that is happy to hang out in the living room while you go to the bedroom or bathroom, might be a tad bit independent, and tougher all around to train and live with. A pup that is happy to hang out in the living room when you go to the fridge, needs its temperature checked.
GSDs are dubbed "velcro dogs" because of their desire to be right with us all the time. I used to have to tell Cujo,, "Really boy, I can take care of this on my own, and there is no exit" when I went to the can at my folks' house.
Babs is usually great, will lie on my bed or sit on her chair in my study now while I am in other parts of the house. When she was a pup, she wanted to even check on me when I was in the shower -- what a goof!
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC