Foods That Can Be Toxic for Your Dog: https://www.petmd.com/dog/centers/nutrition/slideshows/toxic-foods-for-dogs
While we may consider dogs to be members of our family, treating them as such at mealtimes can cause more injury to them than just spoiling their dinners. Here’s a look at the five most dangerous foods for your dog, how they affect their bodies, and what to do in case of an emergency. The below list is NOT all inclusive, but provides the most dangerous ones to keep away from your dogs.

Chocolate:
Unlike their feline friends, most dogs don’t have an “off” button when it comes to finding food, says Dr. Tina Wismer, medical director at the ASPCA Animal Poison Control Center. While the amount of chocolate your dog consumes will also determine the toxicity, symptoms of chocolate poisoning to look out for can include vomiting, diarrhea and seizures. According to Dr. Wismer, the darker the chocolate is, the more serious the poisoning can be — making baker’s chocolate and cocoa powder more dangerous than milk chocolate.

Xylitol:
An artificial sweetener found in sugarless gum, candy, and baked goods, Xylitol may be approved for people but can cause liver damage and a life-threatening drop in blood sugar in dogs. According to the Pet Poison Helpline (PPH), a 10-pound dog would only need to eat a single piece of sugar-free gum to reach a potentially toxic dose. Low blood sugar can develop within 10 to 15 minutes of ingestion, in addition to vomiting and loss of coordination, says PPH.

Grapes:
Both grapes and raisins can cause kidney failure in dogs, with vomiting, increased urination and increased thirst potential symptoms of poisoning. Help your dog stay out of trouble by keeping grapes and raisins out of reach at all times. Dr. Wismer also recommends talking to your vet about a list of things you and your children should or shouldn’t feed your pets.

Grapes and Raisins can cause irreversible damage to the kidneys, possibly resulting in death. Ingesting as few as 4 to 5 grapes or raisins can be poisonous to a 20-pound dog, though the exact toxic dose is not established. Sensitivity depends on the particular dog.
Signs of toxicity include vomiting, loss of appetite, diarrhea, abdominal pain, decreased urine production (possibly leading to a lack of urine production), weakness, and a drunken gait.
The onset of signs typically occurs within 24 hours (though they can start just a few hours after consumption).
Your vet may start by inducing vomiting, or the stomach might be pumped (gastric lavage). Treatment involves aggressive supportive care – particularly fluid therapy and medications.

Onions/Garlic:
If eaten in large amounts, onions and garlic can cause the destruction of red blood cells and lead to anemia in dogs, Dr. Wismer says. Although the size of the dose determines the level of poisoning, lethargy and a reduced appetite can be symptoms of a toxic reaction. The sooner you diagnose potential poisoning the better, so if they’re acting strangely don’t hesitate to call your veterinarian.

Alcohol:
Beer, wine and cocktails aside, alcohol can also be found in desserts and can be created in your dog’s stomach if they ingest homemade or store bought yeast dough used in making bread, rolls and pizza. Even small amount of alcohol, both ingested through alcoholic beverages and produced in the stomach, can be life threatening, making it important to call your vet before you notice any serious poisoning symptoms like seizures. Dr. Wismer suggests teaching your dogs how to “leave” or “drop” things to prevent them from consuming dangerous foods both at home and outdoors and training young children not to leave things where dogs can get into them.

Caffeinated items:
Caffeine is quite similar to the toxic chemical in chocolate. It can damage the heart, lungs, kidney and central nervous system.
Commons sources of toxicity include caffeine pills, coffee beans and coffee, large amounts of tea, and chocolate.
Signs typically begin with restlessness, hyperactivity, and vomiting. These can be followed by panting, weakness, drunken gait increased heart rate, muscle tremors, and convulsions.
Your vet may induce vomiting or perform gastric lavage. Treatment includes administration of activated charcoal and supportive care with fluid therapy and medications.

Alcohol and Yeast Dough:
Alcoholic beverages contain ethanol, a seriously toxic chemical compound that causes central nervous system and respiratory depression.
Uncooked yeast doughs also produce ethanol.
Even small amounts of ethanol can cause toxic effects.
Signs include sedation, depression, lethargy, weakness, drunken gait and hypothermia (low body temperature).
Ethanol is rapidly absorbed into the system, so it is important to seek medical attention quickly. It is not usually helpful to induce vomiting. Treatment includes aggressive supportive care with fluid therapy and medications.
Under controlled circumstances, alcohol is used by veterinarians as an antidote for antifreeze (ethylene glycol) poisoning.

If you believe you pet has ingested a toxic substance, call the ASPCA animal poison control center at 888-426-4435 or the Pet Poison Hotline at 855-213-6680. Both phone lines are open 24 hours a day, seven days a week.