Observe to see what prompts the barking like sounds, passersby, being alone.
Use positive reinforcement to teach "quiet" and "speak" commands. Always reward silence.
Make sure your dog gets adequate walks and playtime to prevent boredom barking.
Limit access to windows/doors to control alert barking. Close curtains/blinds.
As a last resort, citronella or ultrasonic bark collars may help curb excessive barking.
Excessive barking can indicate anxiety. Try calming aids, pheromones or training.
Check for Stress
Don't reward demanding behavior with attention, or the barking will continue.
Ignore Attention Barking