The difference is that the wolf has its own digestive system, and can consume outside food without it having to be processed by the deer, or without having to use the deer's digestive system for nourishment. The same goes for the deer eating the leaves, though admittedly the deer is closer to being a parasite, because the nutrients it is eating are almost digested in the leaf already. Still, the point is that the wolf does not have to attach itself to the deer's belly and siphon off its digested food.
The abortion at age two, by the way, was supposed to be a morbid joke (and a hook-line-and-sinker comment) but I can see that it won't strike too many people as funny. Anyway, once the baby is capable of gaining nourishment without it having to be processed, it becomes a living being.
Bookmarks