Our three month old pup is very submissive to our three year old dog. Now as you can see in the pictures, the pup will be a little bigger. Anyway, the pup will let the older one do anything. If I am throwing a toy and the pup is playing with it and she sees the older dog come, she will let the older dog get it. If they are both playing around, the pup will lay on her back and sometimes even lays her head back so her throat is exposed. I am of course assuming she is being very submissive. Do you guys think that the older one will be the pack leader or will it change when the pup gets older?