Never saw the show but funny it should be brought up on an Australian paranormal podcast right after you posted these. They made fun of the zooming in of a cow being abducted to the methods on CSI. Looks like a floating white blob but "experts" have zoomed in and cleared it up to see hoofs and all.
http://inexplicata.blogspot.com/2009...-analysis.html
......yeah, not quite CSI clear.