Is Pet Euthanasia Painful? A Step by Step Breakdown of What Happens

If you are wondering whether pet euthanasia causes pain, you likely face one of the most demanding days in your pets’ lives. The brief answer is that pet euthanasia is painless when performed properly by a vet. Your pet is sedated first and then injected to put them into a deep sleep before their heart stops.

Knowing what to expect can help you prepare for what's ahead. This article will go over all the steps of pet euthanasia and what you can do to ensure everything goes as smoothly as possible.

Is Pet Euthanasia Painful for Your Pet?

Euthanasia literally means 'good death.' RSPCA Australia's policy states that euthanasia should be painless, cause as little fear and distress as possible, and induce unconsciousness quickly before death.

Most vets will use a barbiturate anaesthetic, such as pentobarbital, to induce unconsciousness. According to the Merck Veterinary Manual, this first causes unconsciousness, then breathing and the heart stop. In practice, this means your pet will fall asleep and not be aware of what happens next.

The only discomfort your pet is likely to feel is the injection of the sedation medication, which is similar to a vaccination.

What Happens During Pet Euthanasia, Step by Step

Step 1: Quiet discussion

A good vet will spend some time chatting with you about what's happening with your pet. They'll answer your questions, explain what they're going to do, and ask how you want things to happen. You can ask to spend some time alone with your pet first, and the vet can pause at any time.

Step 2: Sedation

Most vets will start by giving an injection to sedate your pet. This is usually under the skin or into a muscle, and over the next 5 to 15 minutes your pet will become relaxed, sleepy and then deeply asleep. The AVMA Guidelines for the Euthanasia of Animals, used by vets around the world, recommend sedation before euthanasia as a best practice.

This is often the most tranquil time for your pet, and they can be held, or on their favourite bed or in their sunniest spot, as they fall asleep.

Step 3: The final injection

Once your pet is asleep, the vet will give the euthanasia solution, usually into a vein in their leg. Sometimes they will place a small tube (catheter) into the vein first to make it easier to access. Your pet will be unconscious and will not feel the injection. Their breathing will slow and stop, usually within a minute or two, and then their heart will stop.

Step 4: Confirming your pet has passed

The vet will listen with a stethoscope and check several reflexes, such as heartbeat, to confirm your pet has passed. They'll let you know when it's over.

Things You Might See or Hear

After your pet has passed, their eyes may remain open, and their body may twitch, empty their bladder or take a last reflex breath. These are common signs of the body shutting down after the death of the brain. Your pet is not aware of these sensations and cannot feel pain. If you have any concerns, ask your vet to explain what you're seeing.

Will my dog cry or make noises?

Some dogs whimper before the appointment, perhaps because they're anxious, see a stranger, or are uncomfortable due to their illness. Once the sedative takes effect, they're relaxed and sleepy, and most dogs don't cry out at the injections, especially when treated gently.

Near the end you may hear a noise or a reflex movement as their body shuts down. These are not signs of pain.

Keeping Your Pet Calm and Comfortable

Stress can make some pets more fidgety for the first injection, so the Merck Veterinary Manual suggests creating a calm environment. Familiar surroundings, gentle handling and a soft voice can help. That's why many people choose to say goodbye at home. Pawssum vets have cared for more than 380,000 pets nationwide.

Knowing When It's Time

Deciding when is often harder than actually doing it. RSPCA Australia advise making the decision with your vet based on your pet's quality of life now and in the coming days.

Many vets use the HHHHHMM scale, which asks about hurt, hunger, hydration, hygiene, happiness, mobility and good days versus bad. If bad days outweigh good, or the hurt cannot be controlled, this may be the time to talk to your vet.

When to call a vet straight away

Do not wait for an appointment if your pet:

• Is struggling to breathe
• Is in severe pain that medication isn't controlling
• Has collapsed or can't stand
• Has stopped eating and drinking completely.
• Is having seizures

In these circumstances, call an emergency vet so your pet can be comforted as soon as possible.

Frequently Asked Questions

Does my pet know what's happening?

Your pet does not understand euthanasia the way we do, and what they do know is your voice and touch. With sedation, they simply fall asleep.

Can I be with my pet?

Yes, and most families choose to say goodbye in this way. You can be with them for the entire time, or leave before the final injection. There's no right or wrong choice.

How long does it take?

Generally 15 to 30 minutes, and most of that time is sedation. The final injection takes effect within a minute or two. At home, you don't need to rush.

Will my pet struggle?

It's rare, but some pets can flinch at the first injection. This is generally much less uncomfortable than a vaccination and is over very quickly.

What happens afterwards?

You can choose private or communal cremation, or home burial (where your council allows). The Pawssum aftercare team will discuss the options with you and can organise cremation for you.

Saying Goodbye at Home with Pawssum

You don't have to go through this alone. A Pawssum vet can come to your home to talk through your pet's quality of life, answer your questions and, when you're ready, help your pet pass peacefully where they feel safest. At-home euthanasia is from $399 , and we're open 6am to 11pm, 7 days a week.

Book a home visit online or call us on 1300 343 580.

This article is general information only and is not a substitute for a veterinary examination. If you have any questions about your pet, consult your vet.

References:

• RSPCA Policy A5: Euthanasia of companion animals, RSPCA Knowledgebase
• Euthanasia of Animals, Merck Veterinary Manual (Kathleen Cooney, DVM, reviewed Dec 2024)
• AVMA Guidelines for the Euthanasia of Animals: 2020 Edition (summary via AAEP)
• Euthanasia and Pet Loss, Merck Veterinary Manual (pet owner version, Sept 2025)