• Chocolate
This indulgent treat can seriously endanger a dog’s health, even causing death. Chocolate contains theobromine, a substance which has both a cardiac and a diuretic effect on dogs. After consumption, a dog can may feel overly excited and thirsty. Other possible symptoms include vomiting, diarrhea, and excessive urination. These symptoms may not occur immediately, but could take up to 24 hours before a severe reaction is seen.

• Onions and Garlic
These two food items contain thiosulphate, which could cause a form of anaemia where the dog’s red blood cells burst. Symptoms include vomiting and diarrhea, breathlessness and traces of blood in the urine, and the condition may not appear for several days after ingestion. Onions are far more toxic to dogs than garlic, but the results would be similar.

• Macadamia Nuts
After consumption of macadamia nuts, dogs have been shown to have problems with movement. Dogs can develop tremors, paralysis, swollen limbs and usually have difficulty standing.

• Grapes or Raisins
The ingestion of grapes or raisins can cause a dog to have gastrointestinal issues, including vomiting, diarrhea, lethargy and stomach pain.

• Coffee, Coffee Grounds, or Caffeine Rich Foods
The caffeine in foods can cause your dog’s heart rate to increase. This can result in seizures, tremors, arrhythmias, vomiting, diarrhea, or difficulty breathing.

• Turkey Skin
Every Thanksgiving, vets are certain to get calls from dogs who have participated in the traditional Thanksgiving turkey dinner. Turkey skin can cause acute pancreatis in dogs.

• Mushrooms

Contains toxins that can affect your dog in various ways.

• Sugar-Free Items
  NEW YORK (Sept. 30) - Keep those sugarless treats out of Fido's reach. Veterinarians warned on Friday that a commonly used sweetener might cause liver failure in dogs, and perhaps even kill them. Their report in the Journal of the American Veterinary Medical Association appears to strengthen the suspected link between the sugar substitute xylitol, thought to make dogs sick, and possible liver failure.

Xylitol, a naturally occurring product, is found in many sugar-free chewing gums, candies, baked goods and toothpastes. Researchers Sharon Gwaltney-Brant and Eric Dunayer with staff at a poison unit of the American Society for the Prevention of Cruelty to Animals in Urbana, Illinois, gathered information on eight dogs treated between 2003 and 2005 after eating products containing xylitol. Each dog became ill, and five died or had to be put down because of liver failure, possibly from ingesting xylitol.


One dog who had to be euthanized had eaten four large, chocolate-frosted muffins containing about 1 pound of xylitol.
"People don't think sugar-free gum can kill their dog. I didn't before I got into this. But this is something people should be aware of," Gwaltney-Brant, who co-authored the study with Dunayer, said in a statement. Gwaltney-Brant said for dogs, ingesting even a small amount of xylitol can trigger significant insulin release, which drops their blood sugar and can be fatal. "A 22-pound dog who consumes one gram of xylitol should be treated," she said, adding that further studies were needed to definitely establish a cause-and-effect relationship.