The Megantereon (Sabre-Toothed Cat) kills the Ancylotherium at around dawn. Later that day, the body is almost entirely gone minus ribs and a few slabs of meat. This is impossible due to the cat's teeth (as mentioned by the Narrator) and the fact that Megantereon is not that large. The only way for this to be possible is if the two scenes were separated by a few days.