Proper identification tags will help you recover your pet if he wanders off. These items should be kept away from pets, as ingestion may cause foreign body blockages or injuries to the esophagus, stomach or small intestine. Many plants in their live or dried forms are toxic. Even food items like dried onions can cause problems in pets. Discuss potential problems with your veterinarian or check with the nursery or a more complete reference before buying plants.
Some pennies contain zinc, which can cause vomiting, anemia, and even death if ingested.
Milk chocolate isn't as toxic, and if ingested in reasonable quantities there is no cause for alarm. Many dogs, however, ingest unreasonable quantities and may be poisoned. Antifreeze has a sweet taste to dogs and cats, and they may lick it off the ground. No-Doz may cause convulsions in both cats and dogs. Ask a professional before administering drugs of any kind to your pet.