ORIGINAL: jmbuckhunter
When a deers stomach is full it can push up into the lung area. You don't have to be too far back to catch the stomach then, and it's contents will plug up a wound. Not leaving much of a blood trail.
Sound like what I expierenced one time, me and my buddy did a double on two does out of one ground blind. Made perfect shots on both. Went to retrieve our deer and couldnt find blood, we searched and searched and found both ventually,with a blood trail only about 10yds long from where the both deer fell. Gutted them and it was a mess, hit stomack as well as lungs, these were perfect broadside shots too. Couldnt figure out why but I suspected what you said.