Probably the first story I ever heard where an animal helped a saint was the story of St. Cuthbert. Cuthbert developed hypothermia and would have drowned if sea otters hadn't come to his aid.
This legend planted the seed for a series of saints and animal paintings, and lead to my researching and writing Holy Crocodile!
The painting above of St. Cuthbert Saved by Sea Otters, is done in egg tempera paint on a wooden panel. (The moon in the painting was cut off in this picture, but he glows from the moonlight.)
Here's the drawing of St. Cuthbert from Holy Crocodile! The story still takes place at night, but the sky above St. Cuthbert is white because that where the text of the story goes.
It's hard to see in the painting, because the photo is so dark, but what I like best in both the painting and the drawing are the sea otters little pink tongues!