Australian Shepherds are a popular breed of dog, but like all dogs, they have different dietary needs and some human foods can be toxic to them. Here are some common human foods to avoid feeding to your Australian Shepherd:

1. Chocolate: Chocolate contains theobromine, which is toxic to dogs. Dark chocolate and unsweetened baking chocolate have higher amounts of theobromine than milk chocolate, but all types of chocolate can cause vomiting, diarrhea, increased heart rate, seizures, and even death in dogs if ingested in large amounts.
2. Grapes and Raisins: These fruits contain an unknown toxin that can cause kidney failure in dogs. Even small amounts can be harmful, and the severity of symptoms can vary from dog to dog.
3. Onions and Garlic: Both of these foods contain compounds that can damage red blood cells, leading to anemia. Symptoms of onion and garlic toxicity can take several days to develop and can include vomiting, diarrhea, and difficulty breathing.
4. Alcohol: Alcohol can cause serious health problems in dogs, including vomiting, diarrhea, breathing difficulties, and even coma or death in severe cases.
5. Xylitol: This artificial sweetener, commonly found in sugar-free gum and other sugar-free products, can cause a rapid insulin release in dogs, leading to hypoglycemia (low blood sugar). Symptoms of xylitol poisoning can include vomiting, loss of coordination, and seizures.
6. Avocados: Avocados contain persin, which can cause vomiting and diarrhea in dogs. Although persin is not toxic to dogs in small amounts, it’s best to avoid feeding avocados to your Australian Shepherd.
7. Macadamia Nuts: These nuts can cause vomiting, hyperthermia, and tremors in dogs. In severe cases, they can lead to hind limb paralysis and an inability to stand.
8. Fatty Foods: Fatty foods, such as bacon, sausage, and fatty meats, can cause pancreatitis in dogs. This condition can be life-threatening if left untreated.
9. Bones: Although bones are a common treat for dogs, they can be dangerous and even deadly. Cooked bones can splinter and cause blockages or tears in the digestive tract.

It’s important to remember that not all dogs will have the same reaction to these foods, and the severity of symptoms can vary depending on the individual dog and the amount ingested. If you suspect your dog has ingested something toxic, contact your veterinarian immediately.