Hypothesis!

Ivan studied these living animals closely. The sheep and cow had the small parts that had entered the green light and turned inside-out. To put it simply, the skin had completely disappeared while the blood vessels and internal organs were on the surface. These vessels and organs too showed signs of weird twisting and inversion.

Of course, if it was only just that, Ivan wouldn't have been so shocked. The scariest thing was these two animals were still alive and their organs and blood vessels were still functioning. Yes, even in their state, they didn't stop working.

This was truly a creepy situation. After all, a creature's internal organs were actually very fragile; even a slight tear or damage, much less twisting, would cause them to stop working. The fact that they could still work after being completely transformed was impossible, unless…

Demonization!