HI, I have two yorkie girls. Princess Pia is 1 yr. 7 months old and weighs 2 lbs. My other yorkie girl Trixie Bear weighs almost 5 lbs. Pia had a very difficult time when being spayed and we almost lost her. However, let me make this very clear. This was 100% the vet's fault!!! Pia became sick the day after surgery and I called immediately to take her in and was told to wait until the next day. Well, I gave it a few hours and took her in regardless. They gave her a shot and sent her home. BIG MISTAKE!! By that evening Pia had gone into shock. I rushed her into an ER and the vets there were wonderful. They honestly didn't think Pia was going to make it. Well, she's tiny but a BIG fighter! The ER vets were sickened by the fact that my vet let her go home the same day of surgery and to top it off they should have put her on IV's immediately. She became dehydrated very quickly. The ER vets claimed that she more then likely would have been just fine if put on IV's right away when I took her back in. However, my vet neglected her and we almost lost her. I told you my story only because I wanted to show you how these tiny ones can fight to live!! If you happen to end up with a smaller yorkie make sure you get a good vet!! The ER vet's told me that a 2 lb or 7 lb dog can dehydrate at the same rate of time. I believe any dog under 10 lbs needs to be watched a little more carefully. Other then that experience both my babies have been completely healthy!! Vet bills cost me no more for either girls when compared to my pekingese. I love my little Pia and thought she would be like Trixie's size but it didn't happen. However, I wouldn't change her for anything. Both baby girls are so full of life. Trixie sleeps with me but Pia does sleep in her own bed. I have a very high bed and even with puppy steps she can't make it up, LOL. Honestly I dont see much difference between my 2 or 5 lb baby. I know many think these tiny ones are a big mistake. I have heard the horror stories myself. I've been lucky so far and believe any dog can run into health problems. I thinks its just a risk you take when buying anything. However, I don't believe in breeding these tiny ones and I would prefer to see more standard babies running around. I say this because I think too many people only want them because their small. Anyways, if you have any questions just ask!!