Why do dogs bark. Dog Barking and its meaning. The meaning of dog barks

Continuous and fast barking, at a medium pitch: Alert. Problems. Some is entering our territory.
Continuous and slow barking, at a low pitch: The intruder or danger is close. Prepared to defend itself.
Fast barking with pauses every 3 or 4: Warning of a problem approaching. Asking you to investigate.
Long and drawn-out barks at a high pitch, with pauses between each one: I'm alone and need company.
One or two short high pitched barks: The most normal greeting.
One bark normal pitch: Curious, alert.
Short back in a high pitch: Shows surprise. If it's repeated twice it means "Look at this!" If it's longer then it calling. Many dogs use this when they want to go out.
Brief bark, at medium pitch: Happiness.
Faltering bark at medium pitch: Asking to play.
Howl or short bark at a high pitch: "Ouch!" Response to sudden pain.
Repeated howls and regular intervals: Suffering from extreme pain or something that scares them.
High pitch or urgent barks that sound desperate, without apparent reason: It is a way some dogs use to let out steam.