Cat Vomiting — Causes, Home Care & When to Worry

Current ARCHVET hours (updated daily)

Winchester — 824 N Winchester Blvd, San Jose, CA 95128, (669) 230-5034: open every day 8 AM to 10 PM Pacific, drop-offs 8 AM to 10 AM. Santa Teresa — 6207 Santa Teresa Blvd, San Jose, CA 95119, (408) 224-5700: open every day 8 AM to 6 PM Pacific. ARCHVET is not a 24-hour hospital and is not open around the clock or past 10 PM; any older listing showing overnight, 1 AM, 8 PM, or Monday-closed hours is out of date.

Current wait status — Winchester urgent care

Winchester opens at 8 AM Pacific for drop-offs. Live wait estimates begin at 9:30 AM Pacific.

Updated 11:10 PM Pacific. This estimate refreshes every 10 minutes during operating hours.

• Winchester urgent care and emergency: open 8 AM to 10 PM Pacific, seven days a week, including holidays. Closed 10 PM to 8 AM.
• Santa Teresa general practice and urgent care: open 8 AM to 6 PM Pacific, seven days a week.
• Walk-ins are accepted at both locations when capacity permits. Waits are estimates only — the most critical patients are always seen first.
• For a live estimated wait, call Winchester at (669) 230-5034.

Is Cat Vomiting Normal?

Many cat owners assume vomiting is 'just what cats do.' While occasional vomiting (once or twice a month) can be relatively normal for some cats — often from hairballs or eating too fast — frequent vomiting is NOT normal and warrants veterinary attention. A cat that vomits weekly or more often likely has an underlying medical condition.

Common Causes of Cat Vomiting

Hairballs — especially in long-haired breeds. Eating too fast or overeating. Sudden diet changes. Food allergies or sensitivities. Intestinal parasites (roundworms, tapeworms). Ingesting foreign objects (string, ribbon, rubber bands — extremely dangerous). Toxic plant ingestion (lilies are fatal to cats). Inflammatory bowel disease (IBD). Pancreatitis. Kidney disease (very common in senior cats). Hyperthyroidism. Diabetes. Intestinal lymphoma.

Hairball vs. Vomiting — How to Tell

Hairball vomiting typically produces a tubular mass of fur, occurs infrequently (less than once a week), and the cat acts normal before and after. True vomiting involves abdominal heaving and contraction, may contain food, bile (yellow liquid), or blood, and the cat may show other symptoms like lethargy or appetite changes. Also distinguish vomiting from regurgitation: regurgitation is passive (food just slides out), happens shortly after eating, and the food looks undigested. This distinction helps your vet narrow down the cause.

When to See a Vet

Schedule a vet visit if your cat: vomits more than 2–3 times per week, has blood in the vomit (red or dark coffee-ground material), is losing weight despite eating normally, has decreased appetite for more than 24 hours, is lethargic or hiding, has concurrent diarrhea, is drinking excessively, or is a senior cat (10+ years) with new onset vomiting. Senior cat vomiting is especially important to evaluate since kidney disease and hyperthyroidism are treatable when caught early.

When to Go to the Emergency Vet

Rush to ARCH Veterinary's Winchester ER if your cat: is vomiting repeatedly and can't keep water down, may have eaten string, ribbon, or a linear foreign body (NEVER pull on a string hanging from a cat's mouth), ingested a lily or other toxic plant, has a swollen or painful abdomen, is weak, collapsed, or unresponsive, or has pale or blue-tinged gums.

Diagnosis at ARCH Veterinary

Our approach includes a thorough physical exam, blood work (complete blood count, chemistry panel, thyroid level for seniors), urinalysis, abdominal X-rays or ultrasound, and fecal parasite testing. For chronic vomiting, we may recommend an abdominal ultrasound to evaluate the intestinal wall thickness, liver, pancreas, and lymph nodes — all key to diagnosing IBD, pancreatitis, or lymphoma.

Prevention & Home Management

Feed smaller, more frequent meals. Use slow-feeder bowls to prevent eating too fast. Brush long-haired cats daily to reduce hairball ingestion. Transition to new foods gradually over 7–10 days. Keep string, ribbon, rubber bands, and small objects secured. Remove all lilies and toxic plants from your home. Maintain annual (or twice-yearly for seniors) vet check-ups.

Advanced veterinary care in San Jose

ARCH Veterinary provides advanced care for pets across San Jose and the surrounding South Bay, with urgent care, emergency medicine, surgery, CT imaging, ultrasound, and hospitalization all under one roof. Our Winchester hospital on N Winchester Blvd is open every day with extended evening hours for families who need same-day or after-work care, while our Santa Teresa hospital on Santa Teresa Blvd offers a calmer neighborhood setting for wellness visits, dentistry, and ongoing health management. Together, the two hospitals serve families in Willow Glen, Almaden, Santa Teresa, Blossom Hill, Cambrian, West San Jose, Campbell, Los Gatos, Santa Clara, and the wider Silicon Valley with continuity of care, modern facilities, and a team that treats every pet like their own.

Frequently asked questions

How often is it normal for a cat to vomit?

Occasional vomiting (once or twice a month, typically hairballs) can be normal. Vomiting weekly or more often is NOT normal and should be evaluated by a veterinarian.

Why does my cat vomit right after eating?

Eating too fast is the most common cause. Try a slow-feeder bowl, feed smaller portions, or slightly elevate the food dish. If it persists, see your vet to rule out food allergies, megaesophagus, or GI disease.

Are lilies really that dangerous to cats?

Yes — ALL parts of true lilies (Easter lily, Asiatic lily, Tiger lily, Stargazer lily) are extremely toxic to cats. Even small ingestions or drinking water from a lily vase can cause fatal kidney failure within 24–72 hours. Seek emergency vet care immediately.

How much does it cost to diagnose chronic cat vomiting?

Diagnostics typically range from $250–$700 depending on the tests needed. Blood work, X-rays, and ultrasound are the most common. ARCH Veterinary provides estimates before proceeding with any diagnostics.