If they got it to the point of death, then it was most likely pumped. To pump you pass a tube down the esophagus, the fluid automatically goes down, no other option. With drenching they will normally swallow, but if they get to that point then most cattle can still avoid it. The bigger concern with pumping and what happens most times, is people that dont know what they are doing and go down the trachea instead of esophagus and drown the animals.