What does any animal eat? It eats. It’s what it eats. While that may not always be the most pleasant thing to come up with to describe what animals eat, I’m glad it exists, because it’s a much needed point of comparison for the sheep that eat it.
You could say that sheep eat almost anything. Animals are a pretty great source of protein, and are great at hunting and eating other animals. It’s interesting to think about though that while some animals love to eat meat, many other animals seem to take it more as a sign of dominance. While we’re not certain of the cause, it’s hard to imagine sheep eating a snake.