Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

When Should Cats Stop Eating & Drinking Before Spaying or Neutering? Vet Approved Advice

orange cat eating wet food

Before most surgeries, it is generally recommended that you stop feeding and giving water to your feline. When under anesthesia, there is always a chance that the cat may vomit while asleep and then aspirate. However, the chance is lower if there isn’t anything on the cat’s stomach. Your vet will provide you with very specific guidelines based on your cat’s needs, so check with them to ensure you are following these rules, or your cat may not be able to have surgery.

Not all cats need to wait the same amount of time, and it depends mainly on the cat’s age. Younger cats need to eat more often, or they may be at risk of hypoglycemia. Therefore, they may need to be fed closer to their surgery time. For some young cats, this may mean that the time they can have a very small amount of food is around 4–6 hours before their surgery. Older cats are often not to be fed overnight the day before their surgery. However, the exact guidelines vary from vet to vet. Some recommend restricting food intake starting at midnight or the evening before. Some recommend simply not feeding during the morning time. Importantly, most vets do not restrict water intake for your cat prior to surgery- so be sure to clarify this, as well.

divider cat paws oct 2024

Reasons Why Fasting Is Important

Fasting is recommended for a few different reasons. Anesthesia often causes cats to become nauseous. Furthermore, it temporarily removes their ability to swallow. Therefore, it’s very easy for cats to breathe in anything they vomit. This leads to a very serious condition called aspiration pneumonia, when an infection sets up in your cat’s lungs, and can be very serious. Thankfully, aspiration pneumonia is relatively uncommon.

brown white cat eating from feeding table
Image By: Princess_Anmitsu, Shutterstock

When Does the Rule on Fasting Change?

Sometimes, fasting recommendations change. Younger cats often have a harder time maintaining their blood sugar. Therefore, they may require fasting for a shorter period of time. A younger cat’s stomach also empties faster, so a shorter withdrawal of food may pose fewer problems.

Furthermore, cats with certain underlying conditions like diabetes may also be unable to go for long periods without food, particularly if they will be getting a dose of insulin during this period. You should speak to a vet about fasting guidelines, especially if your cat has underlying conditions or is very young.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

How to Fast Your Cat Before Surgery

Fasting your feline may seem pretty straightforward. After all, all you need to do is remove their food bowl, right? While this works for most cats, there are other considerations. For instance, you need to consider that your cat may try harder to find food once they’ve realized breakfast is not being served!

Your cat may be more likely to get into the trash can, hunt small animals, or get into the pantry. Therefore, you should ensure that all potential food sources are put away and secure. Even if your cat usually doesn’t normally get into things, they may if they become hungry.

Can Cats Drink Water Before a Surgery?

Usually, pets can have water before surgery. However, it does depend on the vet. Some may have different recommendations, depending on your feline. You should ask your vet about water and other items, such as routine medications they might normally get during the fasting period, to see whether they should be given.

Hungry cat near empty bowl
Image By: Crazy nook, Shutterstock

divider cat paws oct 2024

Conclusion

It is usually recommended for adult cats to fast start the night before the surgery. However, it depends on the age. Some cats with underlying conditions may not go this long without food. These cats should be provided with food under your vet’s directions. Very young cats may also be unable to go this long without food.

With that said, there are lots of variances between cats, so we recommend speaking with your vet regarding how long your cat may need to fast. It is important to follow any vet recommendations to ensure that your cat gets through surgery with as few complications as possible.


Featured Image Credit: Pixel-Shot, Shutterstock

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Megaesophagus in Cats: Signs, Causes & Treatments (Vet Answer)

We all know just how important the esophagus is to not just the human body but to the bodies of our pets as...

tabby cat on the sofa

Spay & Neuter Awareness Month: How & When Is It Celebrated?

February is spay and neuter month. During this month, many pet organizations promote spaying and neutering your pets to avoid overpopulation. Furthermore, spaying...

veterinary surgeon checking bandage on cat stressed after spaying

Can Cats Drink Pedialyte? Vet Approved Advice

Pedialyte is an oral solution consisting of mostly water with added electrolytes. It is commonly used as a treatment for dehydration in children,...

Can Cats Drink Pedialyte

Cat Drinking a Lot of Water & Meowing? Vet-Approved Advice & When To Worry

If your cat is making more noise than usual and constantly visiting the water bowl, it might be a sign that something is...

cat drinking water from fountain

More related

Calico cat standing up begging for treat asking for food scratching leg looking up

How to Get My Cat to Stop Begging for Food at Night: 8 Vet-Approved Tips

Is your cat constantly begging for food at night? Maybe it’s the early evening when you’re still awake, or perhaps you’re dead asleep...

tabby cat on the sofa

Megaesophagus in Cats: Signs, Causes & Treatments (Vet Answer)

We all know just how important the esophagus is to not just the human body but to the bodies of our pets as...

close up of cat testicles balls

6 Interesting Facts About Cats’ Testicles & Vet Approved Neutering Advice

Companion animals are commonly neutered, so it’s easy to forget that when male cats are born, they come into the world with all...

White little kitten in toilet with sand filler

8 Ways to Make a Constipated Kitten Poop (Vet Answer)

If your kitten is constipated, their feces remain in their colon longer than normal, causing the intestines to absorb water and making the...

Keep reading

How to Tell if a Cat Is Scared (4 Vet-Reviewed Signs to Look For)

One of the hardest parts of being owned by a cat is not always knowing exactly how they’re feeling. As typically stoic animals, it can be difficult to tell if your cat is in discomfort or feeling vulnerable in some...

cat hiding

Fear-Free Vet: Vet-Verified Advantages, Disadvantages & FAQ

Vet visits have always been instrumental in promoting our pets’ health and longevity. But for most cats, the experience can be more stressful than anything. The strange setting and unwanted interactions with unfamiliar people make a perfect formula for anxiety,...

vet holding a cat

Why Does My Cat Burrow Under Blankets? 7 Vet-Verified Reasons

Kitties have some pretty interesting mannerisms. They’re always doing some quirky behavior that, as humans, we can barely understand. If you have a cat that likes to tunnel or weave underneath your blankets, you might wonder what would prompt this—because...

Cat hiding under the blanket

6 Reasons Your Cat Kneads and Purrs: Vet-Approved Facts

Cats knead for various reasons, from showing affection to soothing themselves, and nothing beats being on the receiving end of sweet kitty affection! Holding your cat while they knead and purr can make all your human worries vanish into thin...

Cat paw on a red fabri

13 Vet-Verified Signs You Need to Take Your Cat to the Vet Right Away

Cats are experts at hiding illnesses, a trait they’ve inherited from their wild ancestors because an unwell wild cat would often become a quick and easy target for predators. Your cat may not have to worry about predators picking them...

vet giving medicine to a cat

How Long Does a Cat Hold a Grudge? Vet-Reviewed Information

Your cat doesn’t hate you. Thankfully, humans are the only species that write vengeful songs about our exes and actively harbor bitterness. Although cats don’t technically hold grudges, that argument might be a tough one to prove at times when...

owner petting a hissing angry tabby cat

Halo Cat Food Review of 2025: Recalls, Pros & Cons

Review Summary Halo was established in the 1980s when founder Andi Brown struggled to find a cure for her cat’s array of health problems. Spot suffered from flea infestation, urinary tract complaints, and infections in his eyes and ears. Despite...

Halo Holistic Cat Food Review

Can Cats Eat Pansies? Vet-Reviewed Facts & FAQ

Pansies are a staple for anyone who appreciates a splash of color in their garden. These colorful, diverse, easy-to-grow plants are certainly popular with those who love gardening, but what if your cat also develops a liking for them or...

Can Cats Eat Pansies