Don't use insect sprays and weed killers around your pets or allow antifreeze to spill in any area where pets hang out. If animals get poisons on their fur or paws, then lick themselves, they can get very sick or even die.
Never leave a pet alone in a car on a hot day, even with the windows cracked open. Temperatures can go up quickly and cause an animal to overheat, which is sometimes fatal.
Don't ever feed your pet chocolate, no matter how much they might beg. Dogs can't digest chocolate and can die from eating too much.
Don't let your dog wander the neighborhood without you. She could get lost, hurt, or catch a disease from another animal. Always keep her on a leash when in public areas, like a park or busy street.
Never give pets human medicine. Keep all medicines - human or pet - out of your pet's reach.