I did educate myself on this the best I could because I have a niece with a 3lb girl who wanted my Laddy to stud for her. I asked the vet and the breeders here at YT and got the same answers. My vet said absolutely not. That most of the time their uterus is just not what it should be to carry them and that even if they do chances are good that they will need a c-section. It is risking her life. I got the same responses from breeders here on YT. I know in the past before we knew much about spaying and neutering (showing my age now lol) we had a teeny tiny beagle. She was accidently bred to another beagle and bless her little heart did not survive delivery. We are not breeders and were novices she started to bleed so bad because she was just to small we didnt get her to the vet in time. It was horrible to watch this happen to her. Yes I know breeders have lots more knowledge than I had but why chance it.