Hopefully no one will gang up on me for this, BUT IT'S A YORKIE. lol I work in a grooming shop and ALL yorkies except for mine and one other that comes in screams and fights over their nails. The best thing you can do is from the DAY you get your puppy is play with it's feet and pads and nails so it'll be better. Your pup may have had it's nails clipped at one time by a groomer who didn't know what they were doing and made them bleed on every nail (I've had many customers come in with this horror story from other groomers). If it comes to the point that it's just too hard for you to hold your puppy and trim her nails, take her to a groomer you can trust (not PetCo or PetSmart people. I've heard too many bad things from there). A local groomer with lots of experience is your best bet. They usually only charge around $5 to have this done. If all else fails, see your vet and let them do it. Some yorkies will just fight it their whole lives. It's the attitude they have. It's in their blood. lol