Essential Guide: Toxic Foods You Should Never Feed Your Dog or Cat

May 14, 2025 | rebecca |

As pet owners, we want nothing but the best for our furry companions. We often shower them with affection and, sometimes, even share our meals with them. But did you know that some foods we eat every day can be extremely harmful — even deadly — to dogs and cats? It’s essential to be aware of the toxic foods lurking in your kitchen and learn how to keep your pets safe.

In this guide, we’ll cover a list of toxic foods that you should avoid feeding your dog or cat, and we’ll also discuss the symptoms of poisoning and what to do if your pet consumes something dangerous. By being informed and cautious, you can ensure that your pets stay healthy and happy.

The Most Common Toxic Foods for Dogs

Dogs are known to be food-loving creatures, and they’ll often beg for a bite of whatever you’re eating. However, many human foods are dangerous for them. Below are some of the most common toxic foods for dogs:

  1. Chocolate

Chocolate is one of the most well-known toxic foods for dogs. It contains theobromine, a stimulant that dogs cannot metabolize properly. Ingesting chocolate can lead to vomiting, diarrhea, rapid breathing, and in severe cases, seizures or death.

  • Toxicity varies by type of chocolate:
    • Dark chocolate and cocoa powder are the most dangerous.
    • Milk chocolate is less toxic, but still harmful.
  1. Grapes and Raisins

Grapes and raisins can cause kidney failure in dogs, although the exact reason remains unclear. Even small amounts can lead to symptoms like vomiting, lethargy, and loss of appetite. It’s best to avoid giving these fruits to your pet altogether.

  1. Onions and Garlic

Both onions and garlic contain compounds called thiosulfates, which can cause oxidative damage to a dog’s red blood cells. This can lead to anemia, weakness, and lethargy. Cooking, drying, or even powdered forms of onion or garlic are still toxic.

  1. Xylitol (Sugar Substitute)

Xylitol, commonly found in sugar-free gum, candies, and even some peanut butters, is highly toxic to dogs. It can cause a sudden drop in blood sugar, leading to symptoms like vomiting, loss of coordination, and seizures. In extreme cases, liver failure may occur.

  1. Avocados

Avocados contain a toxin called persin, which can cause vomiting and diarrhea in dogs. While some dogs may tolerate small amounts, it’s safest to avoid giving them any part of the avocado, including the flesh and pit.

  1. Alcohol

Even a small amount of alcohol can be dangerous for dogs. It can cause vomiting, diarrhea, difficulty breathing, and even coma or death in extreme cases. Always keep alcoholic beverages and food containing alcohol away from pets.

  1. Macadamia Nuts

Macadamia nuts are highly toxic to dogs. Even a small amount can cause symptoms such as vomiting, tremors, weakness, and elevated body temperature. It’s best to avoid giving any nuts to your dog, as they can pose various health risks.

  1. Cooked Bones

Cooked bones, especially from chicken or beef, can splinter and cause serious internal injuries to dogs. They may lead to choking, gastrointestinal blockages, or punctures in the digestive tract.

  1. Coffee and Caffeine

Coffee, tea, and energy drinks all contain caffeine, which can be toxic to dogs. Symptoms of caffeine poisoning include restlessness, rapid heart rate, muscle tremors, and vomiting. In severe cases, caffeine can cause seizures and death.

  1. Raw Dough (Yeast)
  • Toxic Ingredient: Yeast (can expand in the stomach)
  • Symptoms: Bloating, abdominal pain, and ethanol poisoning.
  1. Salt
  • Toxic Ingredient: Sodium
  • Symptoms: Vomiting, diarrhea, tremors, seizures, and kidney damage.
  1. Cherries (and Cherry Pits)
  • Toxic Ingredient: Cyanide (found in the pits)
  • Symptoms: Difficulty breathing, bright red gums, dilated pupils.
  1. Tomatoes (Green or Unripe)
  • Toxic Ingredient: Solanine (found in green parts)
  • Symptoms: Gastrointestinal upset, lethargy, and weakness.
  1. Mushrooms (Wild)
  • Toxic Ingredient: Various toxins
  • Symptoms: Vomiting, diarrhea, seizures, and liver failure.
  1. Dairy Products (for Lactose-Intolerant Dogs)
  • Toxic Ingredient: Lactose (for lactose-intolerant dogs)
  • Symptoms: Diarrhea, stomach cramps, and bloating.
  1. Fat Trimmings or Fatty Foods
  • Toxic Ingredient: High-fat content
  • Symptoms: Vomiting, diarrhea, pancreatitis.
  1. Fish (Raw)
  • Toxic Ingredient: Thiamine deficiency (from certain raw fish)
  • Symptoms: Loss of coordination, vomiting, and neurological symptoms.
  1. Nutmeg
  • Toxic Ingredient: Myristicin
  • Symptoms: Tremors, seizures, and high heart rate.
  1. Rhubarb
  • Toxic Ingredient: Oxalates
  • Symptoms: Drooling, vomiting, diarrhea, and kidney failure.
  1. Hops (used in brewing beer)
  • Toxic Ingredient: Unknown, but highly toxic
  • Symptoms: Vomiting, seizures, fever, and death.
  1. Mustard Seeds
  • Toxic Ingredient: Mustard seeds
  • Symptoms: Vomiting, diarrhea, and abdominal pain.
  1. Coconuts and Coconut Oil are safe in small doses and can help with dry skin and full coat. But in large amounts they can cause vomitting, diarrhea and pancreatitis due to its high fat content.

Note: It’s important to keep any toxic foods out of your pet’s reach and always consult a veterinarian immediately if you suspect your dog has ingested something harmful.

Toxic Foods for Cats

While many of the same foods are toxic to both dogs and cats, there are also certain foods that are particularly harmful to cats. Here’s what you need to know to keep your feline friend safe:

  1. Onions and Garlic

Just like dogs, cats are highly sensitive to onions and garlic. Even small amounts of these foods can cause gastrointestinal upset, lethargy, and more serious health issues, including damage to red blood cells.

  1. Chocolate

Cats are also susceptible to the toxic effects of chocolate. The risk is similar to that for dogs, but since cats are less likely to eat chocolate voluntarily, the risk is lower. However, it’s still important to keep chocolate out of reach.

  1. Alcohol

Cats, like dogs, should never be given alcohol. It has the same toxic effects on their central nervous system, causing vomiting, diarrhea, lethargy, and respiratory distress. Keep alcoholic beverages and food scraps with alcohol far away from your feline friend.

  1. Caffeine

Just like dogs, cats are also affected by caffeine. Symptoms of caffeine poisoning in cats include restlessness, rapid heart rate, tremors, and vomiting. In severe cases, it can lead to seizures or even death.

  1. Raw Fish

Feeding your cat raw fish, especially in large amounts, can lead to a condition known as “thiamine deficiency.” This occurs because raw fish contains an enzyme that destroys thiamine, a crucial B-vitamin. Thiamine deficiency can cause neurological symptoms and even lead to coma.

  1. Dairy Products

While cats love dairy, many adult cats are lactose intolerant. This means that dairy products can cause digestive issues, including diarrhea, stomach cramps, and bloating. It’s better to avoid giving them milk, cheese, or cream.

  1. Grapes and Raisins

Although grapes and raisins are more commonly harmful to dogs, they can also cause kidney failure in cats. The symptoms are similar to those in dogs, including vomiting, loss of appetite, and lethargy.

  1. Raw Eggs

Raw eggs can contain bacteria like Salmonella, which can cause digestive issues and food poisoning in cats. They also contain avidin, an enzyme that inhibits the absorption of biotin (a B-vitamin) and can lead to skin problems.

  1. Xylitol (Sugar Substitute)
  • Toxic Ingredient: Xylitol
  • Symptoms: Rapid drop in blood sugar, vomiting, loss of coordination, seizures, liver failure.
  1. Raw Dough (Yeast)
  • Toxic Ingredient: Yeast (can expand in the stomach)
  • Symptoms: Abdominal pain, bloating, and ethanol poisoning.
  1. Avocados
  • Toxic Ingredient: Persin (in large quantities)
  • Symptoms: Vomiting, diarrhea, and difficulty breathing.
  1. Tomatoes (Green Parts)
  • Toxic Ingredient: Solanine
  • Symptoms: Vomiting, diarrhea, and lethargy.
  1. Cherries (and Cherry Pits)
  • Toxic Ingredient: Cyanide (in the pits)
  • Symptoms: Difficulty breathing, red gums, dilated pupils.
  1. Rhubarb
  • Toxic Ingredient: Oxalates
  • Symptoms: Drooling, vomiting, diarrhea, and kidney failure.
  1. Nutmeg
  • Toxic Ingredient: Myristicin
  • Symptoms: Tremors, seizures, and high heart rate.
  1. Mustard Seeds
  • Toxic Ingredient: Mustard seeds
  • Symptoms: Vomiting, diarrhea, and abdominal pain.
  1. Macadamia Nuts
  • Toxic Ingredient: Unknown (can cause neurological symptoms)
  • Symptoms: Vomiting, tremors, and weakness.
  1. Salt
  • Toxic Ingredient: Sodium (high amounts)
  • Symptoms: Vomiting, diarrhea, excessive thirst, tremors, and seizures.
  1. Raw Eggs
  • Toxic Ingredient: Avidin (binds to biotin)
  • Symptoms: Vomiting, diarrhea, and lethargy.
  1. Hops (Used in Brewing)
  • Toxic Ingredient: Unknown, highly toxic
  • Symptoms: Vomiting, fever, seizures, and death.
  1. Potatoes (Green Parts)
  • Toxic Ingredient: Solanine
  • Symptoms: Vomiting, diarrhea, and lethargy.
  1. Persimmons
  • Toxic Ingredient: Unknown, but can cause digestive distress
  • Symptoms: Vomiting, diarrhea, and gastrointestinal upset.
  1. Coconut (in Large Quantities)
    • Toxic Ingredient: High fat content
    • Symptoms: Vomiting, diarrhea, and pancreatitis.

Important Notes:

  • Immediate Action: If your cat ingests any of these toxic foods, seek immediate veterinary assistance.
  • Preventive Measures: Always keep harmful foods securely stored and out of your cat’s reach.

What to Do If Your Pet Eats Something Toxic

If you suspect your pet has ingested a toxic food, it’s important to act quickly. Here are the steps to take:

  1. Call your vet immediately: They’ll be able to guide you on the best course of action.
  2. Contact an emergency pet poison hotline: If you’re unsure or can’t reach your vet, call a pet poison hotline for immediate advice.
  3. Monitor symptoms: Watch for signs of poisoning, such as vomiting, lethargy, or seizures, and provide your vet with as much information as possible.

Conclusion: Protecting Your Pets From Harmful Foods

Understanding which foods are toxic to your pets is essential to keeping them safe and healthy. By familiarizing yourself with these harmful foods and ensuring they are kept out of reach, you can protect your furry friends from the dangers of accidental ingestion.

For further information on pet safety and health, consider visiting reliable resources such as the ASPCA Animal Poison Control Center ASPCA Poison Control or your local vet’s office. By being proactive, you’ll ensure that your pets live long, healthy lives!

Call to Action:

Want more tips on keeping your pet safe and healthy? Subscribe to our newsletter for expert advice, product recommendations, and more!

Internal Links Suggestions:

  1. How to Recognize and Treat Poisoning in Pets – A helpful guide on identifying and managing poisoning symptoms.
  2. 5 Essential Steps to Pet-Proof Your Home – Make your home a safer space for your pets.

External Source Suggestions:

  1. ASPCA Poison Control: ASPCA Toxic and Non-Toxic Plants
  2. PetMD: Common Foods That Are Toxic to Pets

Recent Posts

Categories