Oh my! This is hard, but not really. I think your puppy is trying to find out who he really is. Oscar is exactly what you describe. He is 5 months old today and is just now beginning to truly want our attention. He is wild most of the time, grabbing his toys, playing alone a lot of the time but sometimes, he brings them to us and asks us to play with him. He has turned into quite the "ankle biter" but this is just his way of saying "hey, do you see me here?!!" He gets excited and it goes off in all directions sometimes. But when he is sleepy, he demands to be on the recliner with my husband! He came in the office to me a little while ago and barked and barked...I picked him up and he just whined and whined...I took him in the living room and gave him to his daddy and he is fast asleep...they both love the Lazyboy!!! They have to find their place and get in a routine...Oscar has never been a "lover"...I think as a breed they are quite independent. I hear they calm down at about 18 months tho!!!
But really, give your baby a chance...and give yourself a chance too to grieve the loss of your other Yorkie and to give your new baby time as well. I hope it works out for you...I don't feel one can replace the other in our hearts, but they sure can make that empty place feel a whole lot better with new happy and joyous memories!!!
Oscar's Mom