Reindeer love to eat lichen, which is a type of plant that grows in cold, snowy areas. They also enjoy munching on tree bark, leaves, and grass. Some reindeer also enjoy eating mushrooms and other fungi. Reindeer are also known for being partial to a little salt now and then! So, if you're ever wandering through a snowy forest, keep an eye out for these festive herbivores and don't forget to pack some treats for them!