Title: The Worlds of Ewilan, volume 1 - The Forest of Captives - Pierre Bottero - book
Summary :
Lolle, who hasn't been a calf for a while but is still too young to be a cowhide, catches Champion, the bull of her heart, in the middle of mating with that bitch Susi. Her heart and her three stomachs are turned upside down. And naturally, everything goes from bad to worse, since the farmer has decided to sell the herd to the slaughterhouse to make steak. Lolle has a tender heart, but she doesn't really want to check if the same is true of her flank steak.
So she decides, with her merry companions, to escape to India, where cows, it seems, are sacred...