Kitty wants to be with dog. Looks like that kitty is holding onto the dog for dear life & vice versa! Kitty is totally embracing chained dog in the snow (animal abuse to dog! Kitty knows who it's friend is. (Hint: not the human!
I've seen small birds drive away an owl before, and I think that's what is happening here between a songbird & a Barn Owl. It's astonishing to witness the bravery of small creatures protecting their young and/or their territory.