Ok, let me give you a little hint of what its like having an unaltered male Yorkie verses an altered...I have both..I have a cutie little 5# stud that I decided to use for breeding  and to stud out for fees..well unless you have a show worthy stud and I mean that has been proven in the ring with a CH before his name...the thought of ppl wanting him as a stud and paying a fee doesn't happen often..We used ours in our very small breeding program. Its not because Yogi's not just adorable. he is.

 He has a beautiful silk coat, he's small framed, short nose, well set ears and a great temperament....its just there are alot of male Yorkies out there, and most small breeders, use their own studs, unless the situation is what I mentioned above.....now on a daily basis here in the house..I mop every single day and within 2 hrs of mopping my hardwood floors, I can walk through now and see at least 3 corners of furniture ect. that Yogi has walked by and marked..when other dogs come over (my daughter has 2 Yorkies) he will mark about 5-6 things outside of his normal spots..he walks by our other male when he's eating, sleeping, whatever he's doing and hikes his leg and marks him!!! Shoes laying around..get marked..Do you get my picture?? When our female comes into heat or any female he is around..he is literally nuts with adrenaline for 7-8 days...whinning all night, marking increases..pawing at the door and panting nonstop..Now his behavior isn't abnormal for an unaltered male..its perfectly normal, but it is what it is....You can decide to keep your little guy intact, but this is what your life will be like....

 I just want you to make an informed decision...Good luck! 
Steph