Any age from when they can see and walk to the end
Yes. it is called cat grass for that very reason. it helps them digest foods easier and if they vomit don't worry, that's good for the cat. cat grass helps their stomach. Cat grass is good for cats.
no it is poison to a dogs and cats HOPED I HELPED
Cats can benefit from eating cat grass, such as wheatgrass or oat grass, which can help with digestion and overall health.
cats eat grass because something in the grass makes them throw up, which clears their throat of hair balls. they DO NOT lick the grass for water. they would dehydrate.
Cats do not generally eat grass, so there is no right or wrong answer to your question. If there is an individual cat eating grass, your best bet would be to observe it to find out how much grass it eats.
No they are not, although as with all plants (aside from cat grass) cats should not eat them regularly.
Purple fountain grass is not considered poisonous to cats. If the cat eats any of this grass, it shouldn't experience any side effects.
Catnip is what will make your cat hyper. Catnip affects the majority of cats like a drug (some refuse to eat it or are unaffected by it.) Cat grass is also known as wheat grass and it is eaten by cats for roughage; many owners use it indoors so their cats won't eat their house plants. Some cats have symptoms from catnip other than being "hyper" - acted sedated, or seeming to hallucinate (chasing invisible things, being spooked by nothing, etc.) But catnip doesn't seem to have any ill effects. Cat grass is recommended for a cat's digestive health.
Cats (and dogs) will eat grass if they ate something that disagrees with them and they are trying to flush it out of their system. Plants = fiber!
Cats are obligate carnivores, their digestive systems are incapable of handling fruits and vegetables. Occasionally a cat will eat some grass but this is indigestible fiber that the cat eats instinctively to settle an upset stomach, the cat is not eating it as food but as a "medicine".
How much a cat should or will eat depends entirely on it's age, size, and weight.
Some plants safe for cats to eat include catnip, cat grass, spider plants, and Boston ferns. It's important to research and ensure any plant you give your cat is safe for them to consume.