Below is a list of common houseplants that can be harmful or fatal depending on the quantity
swallowed. Also, remember that cats who chew plants are exposed to any
chemical pesticides or fertilizers that may have been applied directly
to the plants or through the soil.
You can prevent your cat from chewing on plants by misting the leaves then sprinkling them with
cayenne pepper. You might also want to consider planting a container of
grass (regular grass, not the drug) for your cat. If your cats are
digging in your pots, go to your local hobby/craft store and buy a few
pieces of plastic needlepoint canvas. Trim it to the shape of the
pot, cut a slit in it and then a hole in the center for the plant.
Rest it on top of the soil and your cat will be unable to dig.
Note that any plant that looks like a variation of grass is likely going to be considered food to
a cat, so it's best to keep them in hanging pots well out of reach.
Symptoms of poisoning will range from seizures and foaming at the mouth to vomiting and coma.
Immediate medical attention as soon as you see the cat has eaten a toxic
substance (don't wait for symptoms to appear)is necessary.
The ASPCA National Animal Poison Control Center is a 24-hour emergency service with phones manned
by licensed veterinarians and toxicologists (these are NOT free calls;
have your credit card handy). You can call 24 hours a day from anywhere in the U.S.
1-888-426-4435.