We had something similar. My Dad raised goats, and one winter a mother rejected one of her young. Mom and Dad bottle fed her, and put her in with the newborn pups to keep warm.
That goat thought she was a dog! She would run with them, and when they started barking she would bay along with their barks. When they came inside, she came inside. Now I wish I had video of it, but if I did, I don't think I'd be able to find a VCR player to play the tape!
A couple of a350's, an a700 and now an a580, plus even more lenses.