LOL...I also have a himalayan and she's 14 years old and again very beautiful and great with Izzy - if the cats are introduced to your Yorkie the right way within a few weeks they all become buds...Izzy came Memorial weekend and now you would think either all three of my cats are Yorkies or that she is a cat...
And...my third cat is a HUGE Maine Coon...and he is just as gentle with Izzy.