* Sharp Teeth: Yes, cottontail rabbits have sharp teeth. They are herbivores and use their teeth to gnaw on plants and vegetation.
* Shell: No, rabbits do not have shells. Shells are a protective covering found on creatures like turtles and shellfish. Rabbits have fur for protection.
* Thick Fur: Yes, cottontail rabbits have thick fur. Their fur helps them stay warm in cold weather and provides insulation.
So, the statement is partially correct: cottontail rabbits have sharp teeth and thick fur, but they do not have shells.