Short answer: Many common human foods are toxic to cats, including onions, garlic, chocolate, grapes, raisins, xylitol, macadamia nuts, citrus fruits, raw dough, alcohol, and caffeine. Some can cause death with even small amounts.
Knowing which foods are toxic can save your cat’s life. This guide (Toxic Foods for Cats) provides a complete list of poisonous foods, their toxic components, symptoms, and emergency actions.
For a complete list of safe and toxic foods with detailed explanations, see our Cat Food Safety Guide — your pillar resource for everything your cat can and cannot eat.
Quick Answer — Most Dangerous Toxic Foods
| Food | Toxic component | Severity | Emergency action |
|---|---|---|---|
| Onion / Garlic | Thiosulfate | 🚨 HIGH (can be fatal) | Call vet/Poison Helpline |
| Chocolate | Theobromine, caffeine | 🚨 HIGH | Call vet/Poison Helpline |
| Grapes / Raisins | Unknown | 🚨 HIGH (kidney failure) | Emergency vet |
| Xylitol (sugar-free products) | Xylitol | 🚨 HIGH (liver failure) | Call vet/Poison Helpline |
| Macadamia nuts | Unknown | 🚨 MODERATE-HIGH | Call vet |
| Cherries (pits, stems, leaves) | Cyanide | 🚨 HIGH | Call vet/Poison Helpline |
| Citrus (oranges, lemons, limes) | Essential oils | ⚠️ MODERATE | Call vet |
| Raw meat / fish / eggs | Bacteria (Salmonella, E. coli) | ⚠️ MODERATE-HIGH | Call vet |
| Alcohol | Ethanol | 🚨 HIGH (can be fatal) | Emergency vet |
| Caffeine | Caffeine | ⚠️ MODERATE-HIGH | Call vet/Poison Helpline |
| Raw dough | Yeast | 🚨 HIGH (bloat, alcohol) | Emergency vet |
Category 1 — Most Dangerous (Can Be Fatal)
Onion, Garlic, and Other Alliums
| Food | Toxic part | Toxic compound | Symptoms (2-4 days delayed) |
|---|---|---|---|
| Onion (any form: raw, cooked, powder, flakes) | All parts | Thiosulfate | Pale gums, red/brown urine, weakness, lethargy, collapse |
| Garlic (any form) | All parts | Thiosulfate (5x concentrated) | Same as onion, more severe |
| Shallots, leeks, chives, scallions | All parts | Thiosulfate | Same as onion |
| Garlic powder | Most concentrated | Thiosulfate | Most dangerous — tiny amounts toxic |
Hidden sources: Baby food, broths, sauces, gravies, seasonings, rotisserie chicken, deli meats, meatloaf, meatballs, sausages, soups, stews, spice blends, salad dressings, marinades.
Emergency action: Call Pet Poison Helpline: 855-764-7661. Induce vomiting only if directed. Blood work and supportive care needed.
See detailed articles: Can Cats Eat Onion, Can Cats Eat Garlic
Chocolate
| Type | Toxic component | Severity | Toxic dose (for 10lb cat) |
|---|---|---|---|
| White chocolate | Minimal theobromine | Low | Large amounts needed |
| Milk chocolate | Theobromine | Moderate | 1 oz per lb of cat |
| Dark chocolate | High theobromine | High | 0.1 oz per lb of cat |
| Baking chocolate | Very high theobromine | Very high | Tiny amount |
Symptoms: Vomiting, diarrhea, restlessness, hyperactivity, increased thirst, rapid breathing, tremors, seizures, heart arrhythmias (1-6 hours after ingestion).
Emergency action: Call Pet Poison Helpline: 855-764-7661. Induce vomiting if within 2 hours. IV fluids, monitoring, supportive care.
See detailed article: Can Cats Eat Chocolate
Grapes and Raisins
| Food | Toxic component | Severity | Toxic dose |
|---|---|---|---|
| Grapes (all colors) | Unknown | High | As little as 1 grape |
| Raisins | Unknown (concentrated) | Very high | As little as 2-3 raisins |
| Currants, sultanas | Unknown | Very high | Small amounts |
Symptoms: Vomiting, diarrhea, lethargy, loss of appetite, increased thirst/urination, decreased/no urination (kidney failure), bad breath (ammonia), seizures (6-24 hours after ingestion).
Emergency action: Emergency vet immediately. Induce vomiting, IV fluids (diuresis), blood work, hospitalization.
See detailed article: Can Cats Eat Grapes
Xylitol (Sugar-Free Sweetener)
| Food | Toxic component | Severity | Toxic dose |
|---|---|---|---|
| Sugar-free gum | Xylitol | Very high | One piece |
| Sugar-free candy | Xylitol | Very high | Small amount |
| Xylitol peanut butter | Xylitol | Very high | ¼ teaspoon |
| Sugar-free baked goods | Xylitol | Very high | Small amount |
| Sugar-free yogurt | Xylitol | Very high | Small amount |
| Toothpaste | Xylitol | High | Small amount |
Symptoms: Vomiting, weakness, lethargy, collapse, seizures, liver failure (30-60 minutes after ingestion).
Emergency action: Call Pet Poison Helpline: 855-764-7661. Induce vomiting if directed. IV fluids, blood sugar monitoring, liver protectants.
See detailed article: Can Cats Eat Peanut Butter (xylitol section)
Cherries (Pits, Stems, Leaves)
| Part | Toxic component | Severity |
|---|---|---|
| Pit (crushed/chewed) | Cyanogenic glycosides (amygdalin) | Very high (can be fatal) |
| Stem | Cyanogenic glycosides | High |
| Leaves | Cyanogenic glycosides | High |
| Flesh (pitted) | Not toxic | Low (but choking, sugar) |
Symptoms (15-60 minutes): Rapid breathing, bright red gums (early), blue/purple gums (late), weakness, collapse, dilated pupils, seizures, death.
Emergency action: Emergency vet immediately. Cyanide antidote (sodium thiosulfate), oxygen, IV fluids.
See detailed article: Can Cats Eat Cherries
Raw Dough (Bread Dough)
| Food | Toxic component | Severity |
|---|---|---|
| Raw bread dough | Yeast (rising) + ethanol (alcohol) | Very high (emergency) |
What happens: Dough expands in warm stomach (2-3x size) → bloat, stomach torsion. Yeast ferments sugars → alcohol poisoning.
Symptoms (30-120 minutes): Abdominal distension, unproductive retching, restlessness, vomiting, disorientation, weakness, difficulty breathing, collapse.
Emergency action: Emergency vet immediately. Induce vomiting if within 30-60 minutes. IV fluids, gastric decompression, surgery for torsion.
Alcohol
| Food | Toxic component | Severity |
|---|---|---|
| Beer, wine, liquor | Ethanol | High (can be fatal) |
| Alcoholic baked goods | Ethanol | High |
| Fermented fruits | Ethanol | Moderate-High |
Symptoms (30-60 minutes): Vomiting, disorientation, stumbling, weakness, lethargy, difficulty breathing, tremors, seizures, coma, death.
Emergency action: Emergency vet immediately. Induce vomiting if within 1-2 hours. IV fluids, supportive care.
Category 2 — Moderately Dangerous
Macadamia Nuts
| Food | Toxic component | Severity |
|---|---|---|
| Macadamia nuts | Unknown | Moderate-High |
Symptoms (1-12 hours): Weakness (especially hind legs), tremors, vomiting, lethargy, hyperthermia.
Emergency action: Call vet. Induce vomiting if within 2 hours. Supportive care.
Citrus Fruits (Oranges, Lemons, Limes, Grapefruit)
| Part | Toxic component | Severity |
|---|---|---|
| Flesh | Essential oils (limonene, linalool) | Moderate |
| Peel/rind | Essential oils (highest concentration) | Moderate-High |
| Seeds | Essential oils + trace cyanide | Moderate |
| Leaves/stems | Essential oils | Moderate-High |
Symptoms (30 min – 6 hours): Drooling, vomiting, diarrhea, lethargy, tremors, photosensitivity.
Emergency action: Call Pet Poison Helpline: 855-764-7661.
See detailed article: Can Cats Eat Oranges
Caffeine
| Food | Toxic component | Severity |
|---|---|---|
| Coffee, tea, soda | Caffeine | Moderate-High |
| Energy drinks | Caffeine | High |
| Chocolate (also has theobromine) | Caffeine + theobromine | High |
Symptoms (1-6 hours): Restlessness, rapid breathing, heart palpitations, tremors, seizures.
Emergency action: Call Pet Poison Helpline: 855-764-7661.
Raw Meat, Raw Fish, Raw Eggs
| Food | Toxic component | Severity |
|---|---|---|
| Raw chicken | Salmonella, Campylobacter | Moderate-High |
| Raw beef | E. coli, Salmonella | Moderate-High |
| Raw fish | Thiaminase (B1 deficiency) + bacteria + parasites | Moderate-High |
| Raw eggs | Salmonella | Moderate-High |
Symptoms (12-72 hours): Vomiting, diarrhea (often bloody), fever, lethargy, dehydration.
Emergency action: Call vet. IV fluids, antibiotics if bacterial infection confirmed.
See detailed articles: Can Cats Eat Raw Meat, Can Cats Eat Raw Chicken, Can Cats Eat Raw Fish
Hidden Sources of Toxic Foods
| Toxin | Hidden sources |
|---|---|
| Onion/garlic powder | Baby food, broths, sauces, gravies, seasonings, rotisserie chicken, deli meats, meatloaf, meatballs, sausages, soups, stews, spice blends, salad dressings, marinades |
| Xylitol | Sugar-free gum, candy, mints, peanut butter, baked goods, yogurt, pudding, gelatin, cough syrup, toothpaste, mouthwash |
| Raisins | Raisin bread, bagels, cereal, granola bars, trail mix, fruitcake, cookies, rice pudding |
| Grapes | Fruit salad, grape juice, wine |
| Chocolate | Candy, baked goods, hot chocolate, chocolate milk, chocolate syrup, ice cream |
| Macadamia nuts | Trail mix, cookies, candies, nut mixes |
Emergency Protocol — Cat Ate a Toxic Food
Step 1: Identify what they ate
| Question | Why it matters |
|---|---|
| What food did your cat eat? | Identifies the toxin |
| How much? | Estimates toxic dose |
| How long ago? | Determines if induced vomiting is possible |
| Do you have the package? | Bring to vet (ingredients, concentration) |
Step 2: Call for help
| Helpline | Phone Number | When to call |
|---|---|---|
| Pet Poison Helpline (USA/Canada) | 855-764-7661 | Any suspected poisoning |
| ASPCA Animal Poison Control | 888-426-4435 | Backup |
| Your local emergency vet | (keep on fridge) | For treatment |
Step 3: Do NOT induce vomiting unless told to
| Do NOT induce vomiting if: | Why |
|---|---|
| Cat is unconscious | Aspiration risk |
| Cat is having seizures | Aspiration risk |
| Cat has trouble breathing | Aspiration risk |
| Toxin is caustic (acid/alkali) | More damage coming up |
| More than 2 hours have passed | Toxin already absorbed |
Step 4: Go to emergency vet if:
- Cat ate any food from Category 1 (Most Dangerous)
- Cat is showing any symptoms
- Cat has pre-existing health conditions
- Kitten or senior ate something suspicious
- You’re unsure — better safe than sorry
Printable Toxic Foods Summary Table
| Food | Toxic component | Symptoms | Emergency |
|---|---|---|---|
| Onion, garlic, shallots, leeks, chives | Thiosulfate | Pale gums, red urine, weakness, anemia | Call vet |
| Chocolate | Theobromine, caffeine | Vomiting, tremors, seizures | Call vet |
| Grapes, raisins | Unknown | Vomiting, no urination | Emergency vet |
| Xylitol | Xylitol | Seizures, liver failure | Call vet |
| Macadamia nuts | Unknown | Weakness, tremors | Call vet |
| Cherries (pits, stems, leaves) | Cyanide | Rapid breathing, red gums, collapse | Emergency vet |
| Citrus (oranges, lemons, limes) | Essential oils | Drooling, vomiting, tremors | Call vet |
| Raw meat/fish/eggs | Bacteria | Vomiting, diarrhea, fever | Call vet |
| Alcohol | Ethanol | Disorientation, coma, death | Emergency vet |
| Caffeine | Caffeine | Rapid breathing, tremors, seizures | Call vet |
| Raw dough | Yeast, ethanol | Bloat, alcohol poisoning | Emergency vet |
Emergency Contact Information — Fill This Out
| Contact | Phone Number |
|---|---|
| Pet Poison Helpline | 855-764-7661 |
| ASPCA Animal Poison Control | 888-426-4435 |
| Your regular veterinarian | _______________ |
| Emergency vet hospital | _______________ |
FAQs About Toxic Foods for Cats
| Question | Answer |
|---|---|
| What is the most toxic food for cats? | Onion and garlic (thiosulfate) are among the most dangerous. Grapes/raisins and xylitol are also extremely dangerous. |
| How much onion can kill a cat? | As little as 1 teaspoon of onion powder or 1 ounce of fresh onion can kill a 10lb cat. |
| How much chocolate can kill a cat? | Baking chocolate (1 square) can kill a small cat. Dark chocolate is also very dangerous. |
| How many grapes can kill a cat? | As little as 1 grape has caused kidney failure. No safe amount exists. |
| What should I do if my cat ate a toxic food? | Call Pet Poison Helpline: 855-764-7661 immediately. Do not wait for symptoms. |
| Can a cat recover from food poisoning? | Yes — with prompt veterinary treatment. Delayed treatment has poorer prognosis. |
| What are the first signs of poisoning in cats? | Vomiting, diarrhea, lethargy, drooling, loss of appetite. |
| Can I induce vomiting at home? | No — never unless directed by a vet. Incorrect induction can cause aspiration pneumonia. |
Related Resources from AvailPet.com
Pillar page:
- Cat Food Safety Guide — complete A-to-Z resource for 64 foods
Supportive:
- Cat Food Poisoning Symptoms
- What to Do If Your Cat Eats Something Toxic
- Printable Cat Safe Foods Chart
About the Vet — Dr. Allona Jackson, DVM
I’m Dr. Allona Jackson, a practicing small-animal veterinarian with over 12 years of experience treating cats, dogs, and exotic pets.
I have treated poisoning cases from all foods listed on this page — onion toxicity (blood transfusions), chocolate toxicity (seizures), grape toxicity (kidney failure), xylitol poisoning (liver failure), and more.
My mission at AvailPet.com is simple: give cat owners accurate, life-saving information without the fluff. Every article on this site has been reviewed by me personally.
Conclusion
Knowing which foods are toxic can save your cat’s life.
Key takeaways:
- Know the toxic foods — onions, garlic, chocolate, grapes, raisins, xylitol, macadamia nuts, cherries (pits/stems/leaves), citrus, raw meat/fish/eggs, alcohol, caffeine, raw dough
- Symptoms vary by toxin — from vomiting to seizures to kidney failure
- Hidden sources are everywhere — read labels carefully
- Call Pet Poison Helpline immediately — 855-764-7661
- Do not wait for symptoms — some toxins cause delayed organ failure
- Do not induce vomiting without veterinary guidance
When in doubt, don’t feed it. Your cat’s life depends on you.
Bookmark our Cat Food Safety Guide for all 64 foods — it’s your complete resource for feeding your cat safely.
Your cat depends on you to feed wisely. You’ve got this.
- ✅ Vet-reviewed by Dr. Allona Jackson, DVM — 2026
- 📅 Last updated: May 2026
- ⚠️ Disclaimer: This content is for informational purposes only and does not constitute veterinary medical advice. Always consult a licensed veterinarian for diagnosis and treatment of your pet’s specific condition. In an emergency, call your vet or a pet poison helpline immediately.
- 🔗 Back to pillar: Cat Food Safety Guide
- 🔗 Emergency: Pet Poison Helpline: 855-764-7661
