Foods: Chocolate, which contains theobromine, can be potentially fatal to Australian Cattle Dogs. The darker the chocolate the more theobromine and baking chocolate is the worst. Coffee grounds/beans, anything with caffeine, alcohol, grapes (in large quantities, 1/2 pound to 2 pounds), raisins, onions, broccoli or garlic in large amounts, castor beans, apricots and apricot seeds, pear and peach pits, plum pits, apple seeds, nutmeg, sugarless gums and candies (containing xylitol), wild cherry, almonds, macadamia nuts, balsam pear, yeast dough, tomato and potato leaves and stems, avacados, onions and onion powder, mushrooms, rhubarb, spinach, and japanese plums.

Plants: Aloe vera, asparagus, fen, azalea, cactus, daffodil, deadly nightshade, dumbcane, elephant's ear, ficus, foxglove, holly, honeysuckle, horse chestnut, ivy, japanese yew, jasmine, lilies, liy of the valley, marijuana, mistletoe, morning glory flower, mums, oak, oleander, philodendron, poinsettias, poppies, rhododendron, tulip bulbs, Virginia creeper, wild mushrooms.

Household: Antifreeze (even very small doses are lethal), any household cleaners, bleach, toilet bowl cleansers, drain openers, soap, insecticides (including flea products), mothballs, polishes, rodent poisons, sunscreen, fireworks, citronella, fertilizers, herbicides, batteries, ibuprofen, aspirin, toothpaste (containing xylitol), naproxen, acetominophen, human antidepressants, antibiotics, gasoline, motor oil, transmission fluid, or other dangerous chemicals and medicines, boric acid, deodorants, deodorizers, detergents, de-icing agents, disinfectants, drain cleaners, furniture polish, hair coloring, weed killer, kerosene, matches, nail polish and remover, paint, prescription and non-prescription medicine, rubbing alcohol, shoe polish, sleeping pills, snail or slug bait, turpentine, windshield-wiper fluid.