Lift the Lip: The Ten-Second Check That Tells You a Lot

There's a quick assessment that experienced vets and nurses do reflexively on every sick animal, and it takes about ten seconds. Owners can do it too, and it's one of the most useful things to know.

Lift the lip and look at the gums.

What normal looks like

Healthy gums are bubblegum pink, moist and slightly shiny.

Establish this while your pet is well. Look now, at a healthy animal, so you know what their normal is. Some dogs — Chow Chows, Shar Peis, many black-mouthed breeds — have naturally pigmented black or spotted gums, which makes assessment harder.

If the gums are pigmented, use an alternative site:

• The inside of the lower eyelid — gently pull it down
• The inner surface of the lip further back
• The tongue
• The vulva or prepuce
• The pads, on light-skinned animals

What the colours mean

Pale pink or white

Suggests poor perfusion or reduced red blood cells. Causes include internal bleeding, external blood loss, shock, severe anaemia, or heart failure.

This is one of the more important findings. A dog who has been quiet all day with white gums may be bleeding internally — a ruptured splenic mass is a classic cause in older large-breed dogs, and the outward signs can be subtle until collapse.

Emergency. Go now.

Blue, grey or purple (cyanosis)

Insufficient oxygen in the blood. Causes include airway obstruction, severe respiratory disease, heart failure, pneumonia, or certain poisonings.

Immediate emergency. Minimal handling, keep them calm, phone ahead, go.

Brick red or very dark red

Suggests sepsis, heatstroke, carbon monoxide exposure, or severe systemic inflammation. The blood vessels are dilated.

Emergency.

Yellow (jaundice)

Indicates bilirubin build-up, from liver disease, bile duct obstruction, or destruction of red blood cells. Check the whites of the eyes and the inside of the ears too — jaundice often shows there first.

Urgent. Same-day vet visit.

Very tacky or dry gums

Suggests dehydration. Healthy gums feel slippery; dehydrated gums feel sticky against a finger.

Capillary refill time

The companion test, and it takes another five seconds.

1. Press a fingertip firmly on the gum until the area blanches white

2. Release

3. Count how long the pink takes to return

Normal is under two seconds.

• Longer than two seconds — poor perfusion. Shock, dehydration, heart failure, blood loss.
• Under one second, with brick-red gums — vasodilation, seen in early sepsis and heatstroke.

Combined with gum colour, this gives a surprisingly good picture of circulatory status.

The skin tent test for hydration

Also worth knowing, though less reliable than gums.

Gently pinch and lift the skin over the shoulders, then release.

• Normal: it springs back immediately
• Dehydrated: it returns slowly, or stays tented

Caveats: old, thin animals have less elastic skin and will tent even when well hydrated. Obese animals may not tent even when dehydrated. Use it alongside the other signs, not on its own.

Also check whether the eyes look sunken and whether the gums are tacky — both point to dehydration.

Putting it together

A quick home assessment, in order:

1. Gum colour — pink?

2. Capillary refill — under two seconds?

3. Gums moist or tacky?

4. Resting breathing rate — count breaths for 30 seconds, double it. Under 30?

5. Breathing effort — smooth, or laboured with abdominal effort?

6. Heart rate — hand on the chest behind the left elbow, or pulse on the inner thigh

7. Temperature, if you have a thermometer. Normal 38–39.2°C.

8. Skin tent

9. Alert and responsive?

10. Can they stand and walk normally?

That takes about two minutes and gives you far more to tell a vet than "he seems off."

Why the baseline matters

The reason to practise this on a healthy animal is that the numbers only mean something relative to that individual.

A vet hearing "his capillary refill is about three seconds and his gums are much paler than usual, his resting breathing rate is 44 and it's normally around 20" is getting genuinely actionable information over the phone.

A vet hearing "he seems a bit quiet" is getting almost nothing.

What to do with abnormal findings

White, blue, grey or brick-red gums: go immediately. Phone ahead.

Yellow gums: same-day appointment.

Slow capillary refill with pale gums: go immediately.

Tacky gums with slow skin tenting: vet visit today, particularly with vomiting or diarrhoea.

Raised resting respiratory rate with normal gum colour: call the same day.

Everything normal but they seem unwell: still worth a call. Normal circulation doesn't rule out pain, nausea, or a range of other problems. This assessment tells you about circulation and oxygenation, not about everything.

A note on false reassurance

Normal gums don't mean nothing is wrong. Many serious conditions — an early blocked cat, a foreign body, pancreatitis, a slow-growing tumour — present with entirely normal gum colour and refill time.

Use this to identify emergencies, not to rule them out. If your instinct says something is wrong, act on that regardless of what the gums look like. Owners are right about their own animals far more often than they give themselves credit for.

Practise tonight

Lift your dog's lip. Look at the colour. Press and count.

Write the answer down. That's now your reference point, and one day it will be worth having.

Members record baseline gum colour, resting respiratory rate, heart rate and weight in the community app when their pet is well — so that on the bad night, there's an actual number to compare against instead of a guess.