Here are some to avoid:
Antifreeze – Pets are attracted to the sweet taste of ethylene glycol, and one to two teaspoons will poison a cat and three tablespoons is enough to kill a medium size dog.
Allergies – Fall weather can bring about all whole new set of allergies. Ragweed and mold are two big aggravates, along with grass and dust. Look for signs like scratching, biting, chewing, sneezing, coughing, watery eyes, and hives and rashes.
Arthritis – Cold weather can lead to arthritis caused by inflamed joints. If your pet is limping, having trouble moving, jumping, or sitting, moving slower than usual, or whimpering when he moves, he may be suffering from seasonal arthritis.
Plants and Mushrooms – Mums are seasonally blooming flowers that is commonly associated with fall. Toxicity can occur if your dog or cat ingests the mum’s flower, stems, or leaves. All mushrooms are toxic to dogs. Symptoms of mushroom poisoning can range from mild vomiting and diarrhea to severe digestive problems to complete liver failure.
Candy – Everyone knows that chocolate is toxic to dogs, but so are raisins and the sugar-free sweetener xylitol. Be extra cautious on Halloween where pets can get into bags of candy.
Thanksgiving – Avoid giving your pet fat and fatty foods that can trigger pancreatitis in dogs and cats, and never feed your dog poultry bones. They easily splinter and break and can cause serious damage if swallowed.
Decorations – Halloween, Thanksgiving, and Christmas decorations can all be dangerous to your pet. Ornaments, tinsel, plants, costumes, and other decorations should all be kept out of your pet’s reach.
Plants – Some holiday plants are toxic to dogs. You should avoid holly, amaryllis, mistletoe, poinsettia, Christmas and Thanksgiving cactus, American and European bittersweet, chrysanthemum, Christmas rose, Jerusalem cherry, autumn crocus, and burning bush. They can cause vomiting, diarrhea, depression, lack of appetite, tremors, belly pain, difficulty breathing, shock, organ damage, slowed heart rate, collapse, and even death.