Evidence of "pigs" mourning their dead.

[Catherine]

Maybe the cows like the badger. They do have contact out there in the fields. We mourn the death of non human species so why wouldn't animals mourn the loss of animals of other species. 

I think the boy is amazing. He had the sense to set up the camera and he got some good footage. The kid has a future as a photographer and a biologist.

People with pets of different species notice they mourn the loss of a fellow pet.
My Pink Tongued Skink mourned the loss of my Berber Skink. I wasn't surprized when he died within the year.