From Snorri Sturluson’s Prose Edda:
Freyja is the most famous of the goddesses. She has in heaven a dwelling which is called Fólkvangr, and when she rides to the battle, one half of the slain belong to her, and the other half to Óðinn… When she goes abroad, she drives in a wagon drawn by two cats.
I’d say those two cats have some nice penmanship, but there’s more to them than that. They were huge, mean and they loved to draw. They were The Skogkatt.