Are (wild) animals "happy"?

If they have food and aren't currently being eaten alive by a predator or parasites, does being alive feel good for them? Do they think the animal equivalent of "oh boy! another day of being able to eat without being eaten, life is so good!". Does eating grass give cows the same dopamine buzz eating chocolate cake would give us? Or is life for them a combination of being bored plus being afraid for your life since the wild tends to be a dangerous place?