You should consider having some cat grass available for your cat to eat as they need to swallow it at times to help regurgitate hair that they have ingested while grooming themselves.

You can get this cat grass from pet stores and grow it in a specific area of your property where you know that it will be free from poisons and chemicals.

If the cat gets into the habit of using this grass rather than any other plants on the property to help regurgitate these hairballs, then this reduces the chance of it eating something that could be poisonous and cause it to become ill.

It is cheap and easy to grow, and can even be grown in a sunny spot on the deck if you're living in an apartment.
It is also a good idea to grow a little catnip, as cats love to nibble on this as well.

It is quite a good idea to get your cat accustomed to eating a little bit of greens while they are still young and you can do this by putting spinach or similar vegetables in a food processor or blender and mix it up fine enough to be added to tinned cat food.

This will assist with their digestion and satisfy the need for some greens in their diet. These little bits of extra vegetables that you can add to the diet will help to balance any missing nutrients, vitamins and minerals from the rest of the food they eat.

As can be expected from a cat, they will from time to time decide not to eat anything at all with vegetables in it, so you need to add a little bit of variety occasionally to ensure that they are getting good all around nutrition.

Baby vegetables that are sold for children are also suitable for feeding to your cat provided of course that there is no garlic or onions in the ingredients as these are detrimental to a cat's health.

Also try not to get baby vegetable formulas that have corn in them as they can cause a spike in your cats blood glucose levels and can over the long-term cause diabetes