When I got the two puppies Ginny Joy and Abba Boy We had a war zone. At first the older dogs just escaped by climbing on the sofa and so on.Then as the puppies could climb up after them, tactics changed. Gracie would cry and run to me jumping on my leg so I would pick her up. I hushed the puppies and made them stop trying to nurse on her. Rubin finally bit them both, one quick snap on their neck area and they gave him a wide berth after that. Gracie after a few days of being chased and nipped at, attacked them. I had to make her stop. She had Abba on the floor and he was yelping like crazy. I thought she was really hurting him. I couldn't find any broken skin but, he had wet spots from her saliva on the back of his neck and shoulder area. Abba was so tiny I was really afraid. He even now only weighs barely 3 lbs. But he wasn't hurt. The next day same thing happened with Ginny Joy and Gracie. They rarely fuss or fight now. Lily our Lab is quite big, we didn't let her play with the puppies at first, at all. Mostly afraid she would step on one
. Now Lily lays down and plays with them, we supervise carefully. We never play ball or toss with the Lab and Yorkies at the same time. She would stomp all over them. I guess what I am trying to say is most families settle down into a pecking order, with you as the leader of course. I suggest reading Cesar Millan's books they are cramed full of good advice.