
Dogs can have water before neutering, but it's essential to follow some guidelines to ensure their safety.
The general rule of thumb is that dogs can have water up to 2 hours before the surgery, but it's best to consult with your veterinarian for specific advice.
Dogs can go without food for 12 hours before the surgery, but water is still okay up to 2 hours beforehand.
Your veterinarian may advise you to withhold water entirely for a few hours before the surgery to minimize the risk of complications.
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Pre-Op
Before your dog's neutering surgery, it's essential to prepare them properly. For all dogs over 4 months of age, no food, treats, or snacks are allowed after midnight the night before the procedure.
To avoid accidental ingestion of food, grass, or other objects, keep your dog indoors overnight and on a leash in the morning to prevent access to anything edible. Water is allowed right up until morning, and it's actually better not to take it away to prevent dehydration before surgery.
If your dog eats anything after midnight, the surgery will need to be rescheduled, as this can lead to a high risk of vomiting and aspiration during surgery, which can be life-threatening.
Pre-Op Instructions

The day before surgery, it's essential to stop eating and drinking to reduce the risk of complications and ensure a smooth procedure.
You'll typically be advised to stop eating solid foods by midnight the night before surgery.
It's also crucial to stop drinking any fluids, including water, juice, and coffee, for a certain period, usually 8 hours before your scheduled surgery time.
Make sure to follow your doctor's specific instructions regarding fasting, as they may vary depending on your individual needs and the type of surgery you're undergoing.
Most hospitals require patients to arrive at least 2 hours before their scheduled surgery time to complete any necessary paperwork and get settled.
Plan to have a friend or family member drive you to and from the hospital, as you won't be able to drive yourself after surgery.
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Pre-Op Preparations
Stop smoking at least 6 weeks before surgery to reduce the risk of complications and promote faster healing.

You'll need to inform your doctor about any medications you're taking, including blood thinners, diabetes medications, and steroids.
Get your home ready by removing any tripping hazards and setting up a comfortable recovery area.
Most hospitals require a 10% deposit on the day of admission, which will be deducted from your total bill.
You'll need to arrange for someone to drive you home after surgery and stay with you for at least 24 hours.
Be prepared to sign consent forms and review the risks and benefits of your procedure with your doctor.
Many surgeons recommend a bowel prep the night before surgery to reduce the risk of infection.
You may be asked to wear loose, comfortable clothing on the day of surgery to make it easier to change into a hospital gown.
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Frequently Asked Questions
How many hours before surgery can a dog drink water?
For a dog's surgery, it's best to avoid giving water for at least 2 hours beforehand. If your dog does drink water during this time, inform your vet immediately.
What not to do before neutering a dog?
Before neutering a dog, avoid feeding your dog food after midnight the night before surgery if they're over 4 months old
Sources
- https://www.aspca.org/aspca-spay-neuter-alliance/before-surgery-instructions
- https://www.wangfordvetclinic.com/page/9001/pre-operation-instructions-dog-cat-neuter
- https://www.dogster.com/ask-the-vet/eating-drinking-for-dogs-prior-to-spaying-neutering-vet-answer
- https://vetsonparker.com.au/can-dogs-drink-water-before-surgery/
- https://www.pgclinic.ca/services/pre-and-post-op-instructions/
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