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					Originally Posted by  cesar49     since the standard is 4-7 lbs. ,  the mom should be 5-7 lbs to breed..     |  
 
  Actually, the standard is "not to exceed 7 pounds"  There is no 4 lb weight minimum.  
 
However, I agree--a female should be minimum 5 pounds to breed, with the max size maybe a bit over 7 lbs depending on various factors.  Also, pelvic structure, not just weight should be considered as well.