Someone mentioned in an comment about my cat and his love of string that I should give him something else to chew on. They suggested oat grass, but are there other types of things I can let him eat?
If possible, I'd like to make a "cat garden" in my window, a sort of salad buffet of sorts I can offer to my cat. What sorts of plants are safe?
Hunter finds our ponytail palm fascinating (the leaves are bouncy). He hasn't been able to harm it (he doesn't have teeth) and it's nontoxic (I checked), but I'm not sure what a cat with teeth would do to one.
When we had Kendall, he loved to bat at it, but he didn't chew it.
I trim the frayed edges once a month or so, but my mom has one and she has to do the same thing, so I'm not sure how much of that is natural and how much is due to the cats.
Remember cats are obligate carnivores and they shouldn't be eating anything that's not meat.
Check out this question for reference.
If your cat is vomiting things back up, he shouldn't be eating it and that is a sign you should stop immediately.
If your cat needs treats, freeze dried meat treats are great in moderation. Otherwise, don't give them anything to eat that isn't food.
"Cat Mint", as they call it in the UK. Standard lawn grass is poisonous to cats (which is why they eat it, to make themselves vomit for various reasons). Cat Mint is a grass with a mild psychedelic property for felines, meaning they don't vomit and they only eat a little. They love it.
