Why Don't Animals Need Sunscreen?

You should always wear sunscreen when you're playing outside, but you may have noticed that animals are outside all the time and they don't need sunscreen. Why?

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SOURCES:

https://animals.howstuffworks.com/ani...
https://kids.nationalgeographic.com/a...
http://kids.sandiegozoo.org/animals/r...
https://www.livescience.com/62677-do-...
http://mentalfloss.com/article/83612/...
https://www.nationalgeographic.org/en...
https://www.nytimes.com/2012/05/15/sc...
https://www.smithsonianmag.com/scienc...
http://today.oregonstate.edu/archives...