Be water!
It is a fixed rite for all animals that they practice body care. In swimming poultry, it is even fundamentally important that the fat from the gland specifically designed for this purpose is incorporated into the feathers. Because without this treatment they would simply perish. This Canada goose was bathing and kept diving head first into the water and letting it run down her back. Caught just as she lifted her head and the water was still running all over.