I have two two lb babies. One came out of my 5 lb girl, so we kept her and had her spayed. Luckily she turned out to be fiesty and healthy as the mom. I went looking for a little bf for my sugar and ran across another tiney. Got him for a really fair price. He weighs only 2 lbs and the only thing bad that has happenned to him was my hubby dropped a piece of steak on the floor and he got choked on it, so off to the vet we ran. He was fine and still is. My first yorkie died of kidney failure and she was 2lbs at four month of age. All of these little babies are fragile i think, but for sure I would never breed a dog under 5 lbs. I have bred my little two lb male and had some beautiful pups ranging from 4 to 5.5 lbs. I call the people who buy my babies to see what goes on in my babies lives.I like to know if my babies are ok and that the owner is ok . So far so good