For a dog lover, that was a hell of a picture to see.
I've been through the process of introducing a new pup to old alphas lots of times.
He's first reaction will be : " shit, when is this thing going home"!!
That'll last for about a week, then he'll adopt it and kill anything that threatens it.
I have a good friend who breeds Golden Retreivers ( And has done the hat trick of winning the best in show and best working dog in all the Scandinavian countries once, same year!!!!.
This is a guy who knows his shit)
He told me that back when he bought his first pupppy, The old dog wanted NOTHING to do with it.
Eventually he and his wife decided they'd have to return the pup.
So my friend forgets a tool he needed at work and has to go home and pick it up.
As he is going in, he looks in the kitchen window and sees the old dog asleep on the floor, with the pup nestled nicely between his front paws.
He left quietly and they kept the pup, which is now the great grandfather of a string of renowned hunting dogs all over the country.