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In 1,000 years 3 toed sloths would become smaller. Instead of living in trees they would dig holes to hide in from predators. They would crawl more around on the ground instead of being in trees. The 3rd toed sloths would be smaller so they have an easier time hiding in holes and being able to blend in with the ground environment. Their color would change slightly from being light brown to brownish green to blend in with grass and sticks.