Does Marijuana Affect Cats?

By: Kelli Rascoe / Updated July 1, 2023

If you enjoy partaking in certain... extracurricular activities, carefully consider where to store your stash. Otherwise, a curious cat might mistake it for a similarly herbal cat-friendly treat. Although marijuana has been deregulated across Canada and some regions of the United States, exposure has a less than desirable effect on your feline friends. The effects of weed on cats can result in a stressful experience for both you and your pet, and result in an unwanted trip to the veterinarian.

Whether you are a seasoned cat owner or first-time kitten owner, your cat’s health and safety are a top priority as part of being a responsible pet owner.

We sat down with Trupanion veterinarian, Dr. Caroline Wilde, to discuss the effects of weed on cats and best practices to help keep your furry friend safe, happy, and healthy.

The effects of marijuana on cats

With marijuana laws easing up more and more, it's important to remember to take extra caution around pets. Here's what all pet owners need to know.

What can happen to cats if they ingest marijuana

Whether you’re actively using these products or they’re just sitting around your home, be mindful of cats and kittens that enjoy being curious. Ingestion of any type of marijuana product can have a negative impact.

“Marijuana intoxication in cats can happen when they ingest edibles or parts of plants, as well as inhalation of smoke, and can cause variable signs in cats ranging from sedation to agitation,” says Trupanion veterinarian Dr. Caroline Wilde. Further, even the smallest ingestion can affect your cat’s health and behavior.

Signs of marijuana ingestion in cats

As a pet owner, it can be hard to detect if your cat has ingested marijuana. Dr. Wilde weighs in on what to look for – “Marijuana can cause variable signs depending on the pet. Also, there are no reliable tests to determine whether a pet has ingested marijuana in any of its forms. Determination of whether a pet has marijuana intoxication is generally based on history and clinical signs.”

Essentially, the only way to determine if your cat has ingested marijuana is knowing if your cat has accessed your stash and if something is missing. Rather than leave it to chance, consider doing a sweep and make sure all substances have been safely stored away.

If you feel your cat might be exhibiting signs of marijuana ingestion/toxicity, look for the following:

Signs of marijuana toxicity

• Dilated pupils
• Sedation
• Head Bobbing
• Swaying or seeming wobbly

Ingestion can also cause low heart rate, blood pressure, hyperactivity, and aggression. If you have any questions or cause for concern with your cat, seek veterinary care immediately. Your veterinarian can monitor accordingly and start an appropriate treatment plan.

Best practices for keeping your cat safe

The best practice for keeping your cat safe is to keep your personal products in a safe spot away from your cats, especially when you’re not home. Additionally, all marijuana products, even plants, and baked goods edibles should be put away appropriately.

Wilde also includes these necessary best practices to consider regarding the effects of weed on cats.

“Cats love to eat plants! Protect your cat and keep marijuana/THC in any form locked up or stored in a safe place. Also, avoid exposing your cat to second-hand smoke. In addition, if you think your pet might have been exposed to any form of marijuana, be honest with your vet. Essentially, we have to know what we are treating to be able to best help you.”

Also, keeping a pet-friendly home and a tidy pet space is providing a safe home for your furry friends. This enables you and your cats to relax and enjoy the day without the worry your pets may find some dangerous goodies to ingest.

Remember: You should seek medical care for your cat when they ingest any substance other than cat food, and should result in an immediate trip to the veterinarian.

Keep all forms of marijuana away from cats

If you are partaking in goodies on 4/20 (or any day of the year), be sure to be mindful of how your activities and products affect your cats. By keeping your stash stored appropriately, keeping a tidy space, and providing a smoke-free area for your feline friends to retreat to, everyone can enjoy the day comfortably.

Learn more about keeping your cat safe by reading what vets say about pets and chocolate.