Reindeer

Herbivorous animals endemic to Alaska, Canada, Greenland, northern Europe, and northern Asia, Reindeer are herbivorous. They have grey-brown hair and antlers that distinguish them. Reindeer are employed as a source of food, milk, and transportation in many locations. On the other hand, brown bears, polar bears, and wolves frequently hunt on reindeer. Reindeer numbers are threatened by overhunting, and they are classified as vulnerable species. And they are also one of the animals with multiple stomachs.

Reindeer are ruminants, just like the rest of the deer family. Ruminants "chew the cud" and have four stomachs. This implies they chew their food well enough to swallow it and store it in the first stomach (the rumen). The food is subsequently broken down even further in the second stomach (the reticulum) before being burped back into their mouth to be eaten again. This is known as chewing the cud, and it is commonly done when they are resting. The meal is then swallowed again and absorbed into the third stomach (the omasum). Finally, it is sent to the abomasum, where it is further broken down before being delivered to the intestines, where nutrients are absorbed.

Digestive System: Four Stomach Chambers