You have probably seen videos of animals hunting down prey and eating them, getting blood all over their fur. Have you ever wondered about how they keep clean afterwards, specially ones with white fur? We have listed down the best answers from the internet.
What people tend to forget (or perhaps be unaware of) is that animal fur is not really comparable to say human made fabrics. So stains on white linen or cotton are very much harder to get rid of.
Animal fur is actually most of the time covered in sebaceous secretions, e.g. oil from glands in the skin (which we notice if we don’t wash our hair for a while, it gets greasy). This makes the fur a lot easier to clean when the animal grooms itself, or when swimming or rolling through snow. Things just don’t stick as easily. Compare to say a waxed fabric. That also repels water and dirt, and can often be cleaned just by brushing it.
Furthermore the individual hairs have no natural spaces or holes in them where foreign material can get stuck. Fabrics are usually made from intersoven threads, and these threads can absorb liquids and other impurities either in-between the threads, or within the threads themselves (between the fibers). Hair or fur is made of dead cells which sit so closely together that nothing can really”get in between” them.
And yes, like some others have noted the fur is also shed and renewed, making the dirty patches go away.
Tl:dr: Fur is greasy and does not allow for dirt to be absorbed into it, it is also continually renewed.
Lanolin. It’s the oil found in sheep wool and most other types of animal fur. Really helps keep it waterproof and stain resistant.
Fur is hair and hair grows and falls out.
Even in the case where the fur is literally stained with blood, that stain will fall out over time as the hairs break or shed. The new hairs that replace them will be pristine white again.