
I would say that if you continue giving in then a pup will most definately not groe out of over dependence but this wil become a set habit, as dogs are creatures of hyabit. that is why you must start as you mean to go on with anything with a puppy.
I have found some Spaniles very possesive, and I fostered a Welsh Springer male bred by a friend. He had extreme seperation anxiety, and had lived in a home that was Open plan and was never left. His litter sister was very laid back and quite independant, aqs that is how she was brought up.
He dug gouges in my wall and floor and panted like a whelping bitch when he was put to bed at night in the kitchen with my own bitches for company. I was only the other side of the door in a sleeping bag.
I gradually (having warned the neighbours) brought him round by totatlly ignoring him when he cried or sought interaction. When he eventually settled for a few minutes I weould go over give him a half hearted pat,and continue ignoring. I also used the NILIF program on him once he stopped the panic stricken behaviour, and by the time he went to his new home he could be left with a chew for an hour or so!