The follow up experiment on the goats showed an unexplained weight gain and subsequent return to normal.

All my comment was meant to show was that there are things that happen that we have no proven explaination for. The world is still full of unexplained, and even uninvestigated, stuff. It would be interesting to hear the real reason for the weight changes after death (in goats). It may not be about the soul or whatever, but maybe we will learn something new about the physical world.