Each dog is different.  My 1st yorkie didn't have any problems loosing her baby teeth and getting the adult teeth in.  I had to have six pulled on my 2nd one (she is small 4 lbs) when she was spayed at six months.  They charged me $36 dollars for all six to be pulled.  So yes they can and a lot of them do loose them on their own.  Just watch to see if the adult teeth are coming in next to the baby ones before they fall out.  If this happens then you will need to have them pulled.  
  
Telea, Zoe' and Mia
