You naturally would be alert to signs of illness, but you must also watch for signs your dog is uncomfortable or feeling aggressive. Be cautious around strange dogs and treat your own pet with respect. Be on the lookout for potentially dangerous situations. Children must be taught NOT to approach strange dogs. Children should be taught to ask permission from a dog's owner before petting the dog.
Dogs naturally love to chase and catch things.
Don't give them a reason to become excited or aggressive. Never disturb a dog that's caring for puppies, sleeping or eating. If a dog approaches to sniff you - stay still. In most cases, the dog will go away when it determines you're not a threat. If you're threatened by a dog, remain calm.