What a great Topic Alvindy !
The Breeder we got both of ours from, is also a friend, and, we have
taken both of ours back to their house several times.
As you've read in the previous posts, some do and some don't (recognize).
However, I think it's a little more than just recognition, and depends on
the personality of the individual animal.
My experience with Yorkies, is that they have extremely diverse
personalities. My Male Sneakers is very aloof with his "original" pack
mates and Parents. But, My Female Becca is in total glee, seeing
them. Becca is almost 2 years younger than Sneakers, and it's possible
that her more recent exposure to them, may cause more acceptance.
I remain convinced, that it's an individual issue.