Once again, welcome to YorkieTalk.
When you say "larger", how much does he weigh now? Even a somewhat larger yorkie is still pretty darn small. Gizmo is 7 and a half pounds now and he still seems little to me. And at 5 or 6 months, your pup's still growing. (So is Gizmo at 9 and a half months.)
The hyperactivity will calm down a lot as he gets a little older. Gizmo still gets 'fired up" when people visit, but he calms down after a while.
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The fullness of our heart is expressed in our eyes, in our touch, in what we write, in what we say, in the way we walk, the way we receive, the way we need. -Mother Teresa (
RIP Gizmo 3/9/07-8/18/12)