Submitted by b_b___7 t3_10v4n8b in askscience
Specifically animals that are covered in thick fur or feathers.
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[deleted] t1_j7jbr44 wrote
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vespula_rufa t1_j7jrmsn wrote
In general, herbivores get their vitamin D from the sun, and carnivores get their vitamin D through their diet.
Erazerhead-5407 t1_j7jrx9v wrote
I stand corrected. Thank you so much.
[deleted] t1_j7j8djs wrote
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[deleted] t1_j7jb83v wrote
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[deleted] t1_j7jjwiy wrote
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[deleted] t1_j7k8y0b wrote
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Nervous_Breakfast_73 t1_j7ka4vv wrote
They can by eating, like fish that never see the sunlight. Grass also contains Vitamin D.
Another theory is that many birds and Mammals get their vitamin D from excreated oils which then are ingested while grooming themselves.
I also found a study where cows where covered and produced way less vit D, so it's definitely skin as well. Just because an animal is covered in fur, doesn't mean 0 sunlight reaches the skin.