Just as many household cats eat grass to improve digestion, the Siberian/Bengal tiger in the following video is chomping down on some grass as well.
The video—posted by the world's largest non-profit cat sanctuary, Big Cat Rescue—features a tiger named Shere Khan who weighs over 700 pounds. That's over 77 times heavier than an average domestic feline, and yet the scene below shows the big cat acting much like its smaller relative.
Big Cat Rescue provides the following information to answer the question, "Why do cats eat grass?"
Cats do not possess the ability to separate meat from fur bones or feathers before eating like we do so they have to eat the digestible parts along with the indigestible parts. When the cat has finished digesting what he can the rest has to be removed from the system. To try and pass this through the digestive tract could cause obstruction and severe illness so this is where grass eating comes in.Watch the video:
The habit of eating grass triggers the natural process of regurgitation of indigestible foods including its own fur balls which would otherwise obstruct the system. This can appear to us humans as if the cat is being violently ill but this is not the case and in fact is very beneficial to the cat.
Photo credit: video screen capture