Cat Vomit Color Chart: What Different Colors and Textures May Mean

A cat vomit color chart can help you describe what your cat brought up, but colour alone cannot tell you why the vomiting happened. Clear fluid, foam, bile, food, hair, blood, plant material and other substances can all change the appearance, while the underlying cause can range from a brief digestive upset to gastrointestinal disease, metabolic illness, toxin exposure or a foreign object.

What matters most is the whole pattern: whether your cat vomited once or repeatedly, whether appetite or weight has changed, whether diarrhoea is present, and whether the cat seems weak, painful or unusually thirsty. Cornell advises veterinary assessment when vomiting becomes recurrent or occurs with weakness, reduced appetite, blood, abnormal thirst or urination, or diarrhoea.

Immediate Answer

Different cat vomit colours can provide useful observations but do not diagnose the cause. Yellow or green fluid may contain bile, red material may represent fresh blood, and dark coffee-ground-like material can represent digested blood. Food, foam and hair may also appear. Repeated vomiting or vomiting with appetite loss, weakness, blood, diarrhoea, weight loss or other changes warrants veterinary assessment.

Vomiting Versus Regurgitation

Before interpreting colour, determine what actually happened.

Vomiting is active. A cat may show:

nausea
salivation
repeated swallowing
retching
abdominal contractions

before stomach or upper-intestinal contents are expelled.

Regurgitation is more passive. Food or fluid may appear suddenly without forceful abdominal contractions. Regurgitated food is often relatively undigested and can take on a cylindrical shape because it has been sitting in the oesophagus.

Repeated regurgitation also needs veterinary investigation because oesophageal disease and foreign objects are among the possible causes.

Hairball Versus Vomiting

The phrase cat hairball vs vomit can be confusing because hairballs are usually expelled with retching and may contain gastric fluid or bile.

A typical hairball is mainly a dense collection of hair. Although called a “ball,” it is often elongated or cylindrical after passing through the oesophagus.

Do not assume every cylindrical object is harmless.

Undigested regurgitated food can also appear tube-shaped, and repeated unproductive retching may occur when a gastrointestinal problem or obstruction is present. Hair that remains in the gastrointestinal tract can also occasionally contribute to an obstruction.

Why Colour Alone Cannot Diagnose the Cause

Merck lists a wide range of potential causes of vomiting in cats, including:

gastrointestinal inflammation
kidney or liver disease
pancreatitis
parasites
infections
medications
toxins
food reactions
foreign objects
tumours
other systemic disease

Several unrelated conditions can therefore produce similar-looking material.

Think of colour as something to record, not something to diagnose from.

Clear Fluid

Clear vomit may consist largely of fluid rather than solid food.

It can contain:

swallowed water
saliva
gastric secretions
small amounts of mucus

The colour does not identify the underlying problem.

Pay more attention to whether your cat:

keeps water down
continues vomiting
wants food
remains active
develops diarrhoea

A cat repeatedly vomiting after drinking can become dehydrated and needs veterinary assessment. Persistent vomiting itself can contribute to dehydration and weakness.

White Foam

White foam cat vomit usually indicates that relatively little solid material is present.

Foam can form from gastric fluid, saliva and air during retching. Gastrointestinal inflammation can sometimes produce foamy material, including yellowish foam or bile, but the appearance is nonspecific.

White foam does not automatically mean:

hunger
acid reflux
hairballs
an empty stomach

Look at frequency and accompanying symptoms instead.

Repeated foamy vomiting with lethargy, appetite loss, diarrhoea or pain deserves veterinary attention.

Yellow Fluid

Yellow cat vomit may contain bile, a digestive fluid that can appear in vomited stomach contents.

Veterinary sources describe bile or yellowish foamy material in cats with gastrointestinal upset, particularly once little food remains in the stomach.

However:

yellow vomit does not always mean your cat simply has an empty stomach.

Cats can vomit bile with many different gastrointestinal or systemic problems.

If yellow vomiting:

keeps happening
accompanies appetite loss
occurs with diarrhoea
appears with lethargy
is associated with weight loss

the cause needs broader investigation.

Green Material

Green cat vomit can have several possible explanations.

Greenish material may include bile, but swallowed grass, plants, coloured food or other ingested material can also influence what the vomit looks like. Merck notes that bile and recently ingested material such as grass may be visible during vomiting.

Do not diagnose liver or gallbladder disease based on green vomit.

Instead, note:

whether the green colour is fluid or solid material
whether plant material is visible
frequency
appetite
behaviour
possible exposure to toxic plants

If there is any possibility that your cat ate a toxic plant, seek veterinary advice promptly rather than waiting for additional symptoms.

Brown Material

Brown cat vomit is especially difficult to interpret from colour alone.

Brown material may simply be:

partially digested food
dry food
wet food
another ingested substance

Very dark granular material that resembles coffee grounds is different because digested blood can sometimes have that appearance.

Do not try to decide whether brown vomit represents blood based only on an online colour comparison.

Photograph it and contact your veterinarian if the material is unusually dark, recurrent or accompanied by illness.

Red Material

Red cat vomit may indicate fresh blood, particularly when streaks, drops or larger amounts of obvious blood are present. Gastric irritation or other gastrointestinal bleeding can result in fresh blood appearing in vomit.

Red food, treats or other ingested material can sometimes affect colour, so redness is not automatically proof of bleeding.

However, suspected blood should not be casually dismissed.

Cornell specifically lists blood in vomit as a reason for prompt veterinary evaluation.

Dark or Black Material

Dark brown or black granular vomit that resembles coffee grounds can indicate partially digested blood from bleeding higher in the gastrointestinal tract.

This appearance warrants veterinary assessment.

Do not confuse dark food with digested blood solely from a photograph. Take a picture, note what the cat recently ate and let the veterinary team evaluate the finding in context.

Undigested Food

Food that looks nearly unchanged may be vomited shortly after eating, but it can also be regurgitated rather than vomited.

Look back at the event.

Was there:

salivation?
nausea?
repeated swallowing?
retching?
abdominal contraction?

Those favour vomiting.

If the food appeared almost effortlessly without abdominal effort, regurgitation becomes more likely.

Repeated episodes after meals warrant veterinary discussion because both gastrointestinal and oesophageal disorders can be involved.

Hairballs

Hairballs are collections of swallowed hair that accumulate in the stomach and are eventually expelled.

They are often:

elongated
densely packed with hair
moist
mixed with digestive secretions

Occasional hairball expulsion can occur in otherwise healthy cats, but frequent retching, repeated vomiting, lethargy or appetite loss should not simply be labelled “another hairball.”

A hair mass that enters the intestine can occasionally contribute to a serious blockage.

Mucus

Mucus may appear as:

clear slime
whitish material
stringy fluid
foam mixed with other contents

It can accompany gastrointestinal irritation, but mucus appearance does not identify the cause.

Record whether mucus occurs with:

food
bile
blood
diarrhoea
repeated vomiting

The combination provides more useful information than texture alone.

Foreign Material

Inspect vomit carefully without handling potentially toxic material unnecessarily.

You may notice:

plant pieces
string
ribbon
rubber
pieces of toys
unusual food
medication
other non-food material

Cornell lists string, yarn, rubber bands, plants, medications and many other swallowed objects or substances among possible vomiting triggers.

If a non-food object is present, consider whether additional material could still be inside the gastrointestinal tract.

Vomiting Once

An isolated vomiting episode in an otherwise normal adult cat may sometimes be less concerning than recurrent vomiting.

Monitor:

appetite
drinking
behaviour
stool
urination
whether vomiting happens again

Cornell notes that occasional vomiting can occur, while recurrent vomiting or vomiting accompanied by other clinical changes warrants evaluation.

Do not apply one universal fasting period to every vomiting cat. Feeding decisions can differ according to age, health, frequency of vomiting and the suspected cause.

Repeated Vomiting

Repeated vomiting deserves more attention because it increases concern for an ongoing gastrointestinal or systemic problem and can contribute to dehydration and electrolyte disturbances.

Cornell recommends prompt evaluation when vomiting occurs repeatedly or together with:

weakness
lethargy
reduced appetite
blood
abnormal thirst
urination changes
diarrhoea

Record how many episodes occurred and over what period.

Vomiting After Eating

Vomiting shortly after a meal can occur for several reasons and should not automatically be blamed on eating too quickly.

First determine whether the episode was vomiting or regurgitation.

Then record:

time between eating and the episode
type of food
amount eaten
recent diet changes
whether food appeared digested
whether similar episodes keep happening

If the vomiting began after changing diets, link to Pawnium’s Cat Food Transition Guide, but do not assume the new diet is definitely responsible.

Vomiting With Diarrhoea

Vomiting and diarrhoea together can occur with gastrointestinal inflammation, parasites, dietary problems, infection, toxins and other illnesses.

The combination also increases fluid loss.

Veterinary assessment becomes more important when both are:

repeated
severe
bloody
accompanied by weakness
associated with reduced appetite
occurring in a kitten or senior cat

Use Pawnium’s Cat Poop Colour Chart to record stool appearance without using colour alone to diagnose the cause.

Vomiting With Weight Loss

Vomiting plus progressive weight loss needs veterinary investigation.

Long-term vomiting can occur with gastrointestinal disorders as well as metabolic diseases such as kidney disease, diabetes and hyperthyroidism.

Do not simply switch foods repeatedly or increase portions to compensate for unexplained weight loss.

A veterinarian may need to use blood tests, urine or faecal testing, imaging or other diagnostics depending on the history.

Vomiting With Appetite Loss

Reduced appetite substantially changes the significance of vomiting.

Cornell lists decreased appetite among the accompanying signs that should prompt veterinary evaluation when a cat is vomiting.

Use Pawnium’s Why Is My Cat Not Eating? guide when food refusal becomes a major part of the problem.

Persistent poor intake in cats should not be managed casually, particularly in kittens, seniors and medically vulnerable cats.

Vomiting With Increased Thirst

Vomiting plus noticeable changes in thirst or urination warrants veterinary assessment.

Cornell specifically highlights increased thirst and either increased or decreased urination among changes that make vomiting more concerning.

Vomiting can occur with metabolic diseases including kidney disease and diabetes, but thirst plus vomiting cannot diagnose either one.

Use Pawnium’s How Much Water Should a Cat Drink? guide to record hydration-related changes.

Kitten Vomiting

Kittens deserve a lower threshold for veterinary concern.

Young animals can become affected by dehydration more quickly, and infectious disease, parasites, foreign-body ingestion and dietary problems are among the issues a veterinarian may need to consider. UC Davis advises more prompt veterinary attention for young pets with vomiting than for otherwise healthy middle-aged animals.

Contact a veterinarian promptly if a kitten:

vomits repeatedly
stops eating
develops diarrhoea
becomes weak or lethargic
cannot keep fluids down
may have swallowed an object

Keep age-specific nutrition on Pawnium’s Kitten Feeding Guide rather than trying to solve recurrent vomiting by changing feeding amounts alone.

Senior-Cat Vomiting

Vomiting in an older cat deserves attention when it is new, increasing or accompanied by:

weight loss
appetite change
increased thirst
urination changes
weakness

Kidney disease, hyperthyroidism, gastrointestinal disease and other systemic disorders are among many possibilities veterinarians may investigate in older cats.

Do not assume repeated vomiting is simply a normal consequence of ageing.

String and Foreign-Body Concerns

Cats are especially vulnerable to linear foreign bodies such as:

string
thread
yarn
ribbon
dental floss

These materials may become anchored under the tongue, in the stomach or elsewhere while the remaining length travels into the intestine. Intestinal movement can then cause the bowel to bunch and the material to damage or perforate the intestinal wall.

Possible signs include:

vomiting
appetite loss
lethargy
abdominal pain
diarrhoea

Never Pull Visible String

If string is visible from your cat’s mouth, do not pull it.

Merck specifically warns that pulling an anchored linear foreign body can cause intestinal injury or perforation.

The same safety principle applies if string is protruding from the anus: do not tug on it. Seek veterinary assessment.

Toxin Exposure

Vomiting can occur with poisoning, but the appearance of the vomit cannot tell you which toxin was involved.

Possible poisoning signs can also include:

diarrhoea
lethargy
seizures
abnormal heart rhythm
inability to urinate
breathing difficulty

If you know or suspect your cat contacted a toxic substance, seek veterinary guidance promptly rather than waiting to see what colour the vomit becomes. Cornell advises immediate veterinary consultation for suspected toxic exposure.

Do not induce vomiting unless specifically instructed by a veterinary professional or animal-poison specialist.

What Owners Should Record

Useful information includes:

Date and time
Number of vomiting episodes
Colour
Texture
Food present
Hair present
Foreign material
Blood or coffee-ground appearance
Relationship to meals
Appetite
Water intake
Urination
Stool
Weight changes
Energy and behaviour
Recent diet change
Medication or supplement changes
Possible access to plants, toxins or foreign objects

Veterinary investigation starts with a detailed history because frequency, meal timing, diet, associated symptoms and potential exposures can help determine which diagnostic tests are appropriate.

Take a photograph when practical.

A photo can preserve colour and texture for your veterinary team even after the material has been cleaned away.

When Veterinary Assessment Is Needed

Contact your veterinarian when vomiting:

repeats or becomes more frequent
occurs with reduced appetite
occurs with weight loss
contains suspected blood
happens alongside diarrhoea
is associated with weakness or lethargy
accompanies abnormal thirst or urination
occurs with abdominal discomfort
affects a kitten or medically vulnerable cat
follows suspected foreign-body ingestion

Cornell specifically advises prompt veterinary evaluation when recurrent vomiting occurs or when vomiting accompanies lethargy, weakness, appetite loss, blood, thirst or urination changes, or diarrhoea.

Do not rely on colour alone to decide that veterinary care is unnecessary.

Urgent Warning Signs

Seek urgent or emergency veterinary care when vomiting occurs with:

difficulty breathing
collapse
severe weakness
seizures
substantial or repeated blood
coffee-ground-like material
suspected toxin exposure
known or suspected string or foreign-body ingestion
severe abdominal pain or swelling
repeated vomiting with inability to keep fluids down
major deterioration in behaviour or responsiveness

Persistent vomiting and diarrhoea can lead to dehydration and weakness, while foreign-body obstruction and poisoning can become life-threatening.

FAQs

Does yellow cat vomit always mean an empty stomach?

No. Yellow fluid may contain bile, and bile can appear when little food remains in the stomach, but yellow vomit can occur with many different gastrointestinal problems. Colour alone cannot identify why your cat vomited.

Why is my cat vomiting white foam?

White foam may consist of saliva and gastric fluid mixed with air during retching. Foamy vomiting is nonspecific. Repeated episodes or foam accompanied by appetite loss, lethargy, diarrhoea or pain deserve veterinary assessment.

Is a cylindrical pile always a hairball?

No. Hairballs are commonly elongated, but regurgitated undigested food can also become cylindrical because of the shape of the oesophagus. Look for actual densely packed hair rather than using shape alone.

What does blood in cat vomit look like?

Fresh blood may appear red, while digested blood can sometimes appear dark and granular or similar to coffee grounds. Suspected blood in vomit warrants veterinary attention.

Should I fast my cat after vomiting?

Do not apply one universal fasting plan to every cat. The appropriate feeding approach depends on age, overall health, vomiting frequency and the suspected cause. Kittens and medically vulnerable cats need additional caution. Contact your veterinarian when vomiting is repeated or accompanied by other concerning signs.

What if I see string in my cat’s mouth after vomiting?

Do not pull it. Linear foreign bodies can become anchored beneath the tongue or farther into the gastrointestinal tract, and pulling can cause serious intestinal injury or perforation. Seek veterinary care promptly.