I should have asked this question before I brought our new 12 week puppy Jill in our home where we have already have a 1 1/2 year old 4 lb. Jack. Silly me thought Jack would embrace this sweet little 1 lb 12oz. Jill.
Jack is not happy we brought Jill into our family. Any help from this experienced community would be most appreciated. Jill's family was her mom, dad, brother and another adult yorkie. So she was well socialized with other yorkies. Jack is an only child. He growls at her and won't let her get close to him. So we have separated them and will introduce them gradually for now.
Thank you for any suggestions.
P.S. I know you all like pictures so I posted a few!