Macadamia Nuts are a part of a recent discovery of foods that are great for us but bad for our dogs. The specific chemicals are still unknown, but they cause a toxic reaction in dogs if ingested. Look out for symptoms such as weakness and inability to walk, as well as vomiting, depression and tremors.
Cheese:
Just like milk, cheese has sugars and fatty components that might be difficult for dogs to break down. Symptoms like gas, diarrhea and vomiting are all possible if a dog eats too much cheese.
Garlic:
When it comes to garlic, consider your dog a vampire and keep it away from him. Garlic is much like an onion for a dog, only much more dangerous. A few days after eating some garlic, the dog will seem to be tired and reluctant to move. Another good way to detect this is if the dog's urine is orange to dark red in color. Like eating onions, a blood transfusion might be required in severe cases.