When dogs eat, they are not thinking about anything else. If you get too close to the dog while he's eating, he may think you are trying to take his food.

When dogs are sleeping, and you wake them up by touching them, they can become surprised or scared and try to bite. Don't ever climb over a sleeping dog.

Dogs feel a need to protect their territory. A dog's territory can be many places: his yard, his home, his car, his crate, his doghouse, his toys

If you don't know the dog, just stay away. Don't ever stick your fingers into a crate, a car window, or through a fence. Don't bother a dog who is chewing on a bone, or playing with a toy by himself.

Dogs who are old may not hear or see very well. They can be surprised easily if they don't see or hear you coming.

Old dogs also have body aches and pains that may make them grouchier than they used to be.

Dogs can also get upset if their hair, ears, or tails are pulled.
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Please, don't tease!

Dogs usually don't like you in their face. It bothers most dogs. It's best never to do that. A dog can bite you very easily when your face is so close. Don't walk right up to a dog suddenly.

Most dogs are not happy when they are crowded. Try not to touch a dog unless there is no one else touching him. One person at a time is a good rule. Don't climb over dogs or sit on them.

And never touch someone else's dog unless you have permission from your parents and from the owner of the dog.