I came home and my cat was greeting me at first and then “bathed” itself in sand, likr a bird for example.

Its not even clean sand but rather very dirty sand.

As you can see in the picture and the contrasts of the normal and dirty white he is very dirty.

(Sorry for only taking 1 picture and not a video but then he ran away)

It was dry today and very sunny at 16 °C or for freedom people 60 °F

Does someone has a theory ?