Quote:
    
					Originally Posted by  Yorkie Dad     Mardelin's comment     
"No bearing" is a bit too broad of a statement.  Some bearing would be more precise.  It is really mostly a matter of statistics. Traits by either parent are more likely to be passed on to the descendant. In this case, using a smaller male is more likely to produce smaller pups then using a larger male.  Size is determined by a suite of genes so as Mardelin implies, using a small male is not a guarantee that the pups will come out small. The best predictor for the stud will be in looking at what he has already sired.     
jenhenwood 
The size of the pups in utero during the last week will be the best indication if Delilah will have  problem or not with a natural delivery. Did your vet give you an indication of their size? Without any other information I would agree with Littlebit an Yorkieaddict that Delilah stands a greater then normal chance of needing a cesarean due to her small size.   
Good luck!  I hope you get some extra puppies beyond the two that were seen by your vet.   |  
 
  size of the stud doesnt hold much bearing...I have bred a 3.5lb male to 5.5lb female results varied from 5-8 lbs adult weight.  I have also bred a 6.5lb male to 5.5 female results were 3.5-4.5 adult weight...Unlike Marys example (hers were line breeding) these breedings were total outcross ...     
The best predictor for the stud will be in looking at what he has already sired this is not necessarily true a total outcross breeding will never mimic a previous litter. 
I do not advocate breeding such a tiny little girl let alone having an intact male from a shunt litter be used as a stud accidental or not this litter should have and could have been prevented with merely responsible pet ownership!