I don't know if this has been discussed before...but a breeder here in town has told me to be careful when purchasing male yorkies. Seems that there are more and more lately that have only 1 or even zero testicles.
She said that when you go to see the pup, you are to check their scrotum and feel for the testicles.
I went to a pet shop here in town. Don't know where they got this yorkie, but when I was feeling his scrotum, he only had one in there!
SO BE CAREFUL!!!