Anthropomorphism, associating human traits and emotions to anything non human.
Perfectly normal part of being human.
As for killing a doe and a fawn and thinking the fawn is grieving, no way that is happening. It's more about association and familiarity. That doe is all that fawn has been imprinted with since birth. Nothing more than that.
But with that being said, as I get older, I often find myself torn between killing or not killing an animal. I've been hunting for 50 years. Sometimes something in my head just says don't do it.
Maybe it's my way of coping with my own mortality...who knows. The human brain and your soul are magical and mysterious things. I can't explain it.
I can watch two or three does feeding through an oak flat and just marvel at the complexity of life, but at the same time, know with all my heart that if any creature, animal or man, threatened me or my family, I would not hesitate to end their life on the spot.
I've often thought that a hunter values all life more than others because they know just how fast it can be taken away...