Cats, who eat their normal food like mice and birds need grass too! And they eat it, but not for nutrition. Without to puke, a cat can die, because the hair inside the stomach can get such a big flock, that they can't get it out, and they can't eat no more. Vegetables those outside living cats don't need, when they eat small animals, they eat the content of their stomach too. The stomach of hamster and mouse contents crops , what cat needs for digestion and nutrition too, and what is also put in good can-food for cats.
I observated, that a Persian of a friend no eat grass and even not preened himself - so he had no hair inside to vomit.. He slept the whole day and did move only for get foo...

Cats, who eat their normal food like mice and birds need grass too! And they eat it, but not for nutrition. Without to puke, a cat can die, because the hair inside the stomach can get such a big flock, that they can't get it out, and they can't eat no more. Vegetables those outside living cats don't need, when they eat small animals, they eat the content of their stomach too. The stomach of hamster and mouse contents crops , what cat needs for digestion and nutrition too, and what is also put in good can-food for cats.
I observated, that a Persian of a friend no eat grass and even not preened himself - so he had no hair inside to vomit.. He slept the whole day and did move only for get food.
And sometimes he played in the kitchen with water until all his fur was wet and more - cats are different ....