Cause:
* the mother dog channels narrow pelvis than usual. It may be congenital or cause bone pelvis was broken due to an accident
.* the uterus, no compression, no labor. Dogs can be caused by stress, not total labor force
or dog with so many kids in exhausting labor force in your end. A blockage in the reproductive system makes
.Labor force can not be made of the uterus out come, sometimes the uterus may be fatigue or sluggish without ทราบสาเหตุ
*. The mother dog vagina smaller than usual. Or stenosis in the vagina,
.* the puppy is larger than normal. May be because he is larger than the mother dog dogs puppy
* with big skulls or shoulders wider than usual, or in a position to give birth abnormalities.
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