The main reasons for their barking are excitement, territorial, anxiety, being young, illness, and boredom. The most effective strategies are preventing barking situations from occurring, giving them plenty of exercises, providing treats to distract them from barking, socializing them with new people and other dogs, and providing proper training from a young age.
Possible Reasons for Your German Shepherd’s Barking
- Nerves or Fear
- He is Still Young
- Separation Anxiety
- Territorial Barking
Excitement is a usual factor for German Shepherds to bark. When they sense some fun activity is about to start, they will bark to guarantee it happens. For instance, they might bark when they listen to your footsteps coming towards the door, if the trainer is parking his car, if the dog walker is coming home, or you are giving signs that it is time to go for a walk with them.
2. Nerves or Fear
It is possible that the barking sounds are caused by your dog being anxious or afraid of something. It is also possible that some incidents occurred in the past that your pet does not want to memorize, so they bark to stop their thoughts. It might also be because it is afraid of going somewhere, like the vet, and giving you signals they do not want to go. 
Did you Know?
German shepherds lick their lips and tuck tail in between their back legs when nervous
3. He is Still Young
German Shepherd pups are known for barking a lot. If your German Shepherd is quite small, it will begin to bark less as it matures.
That said, pet parents should begin training while they are still young since they will act more like a grownup, and you would be prepared to handle them whenever they bark.
German Shepherds are trained to be highly energetic canines that will perform difficult tasks with their people on a regular basis for several hours. It implies that they must engage in a lot of physical activity. They will become bored when they do not receive a sufficient amount of physical activity.
Whenever they are dissatisfied, they may become aggressive, and they will bark excessively, as they are seeking attention and entertainment. 
It might be the reason for your German Shepherd’s excessive barking if he is not receiving enough exercise. You should provide them with enough exercises in order to keep them busy.
5. Separation Anxiety
Barking is among the most obvious indications that your German shepherd is dealing with separation anxiety. 
They might even growl, scrape, nibble on items, and engage in other harmful activities in addition to barking. It is crucial to realize that their destructive behavior is not to hurt your feelings; they can not stop themselves from doing it because they are worried. 
If your German shepherd is experiencing anxiety issues, then you must seek guidance from a veterinarian.
Did you Know?
Proper and training and lots of exercises can avoid separation anxiety
6. Territorial Barking
Another reason German Shepherd dogs bark is to guard their territory or their humans. This kind of barking might happen when visitors ring the doorbell or if you are in the presence of other animals and he shows aggression towards other dogs. In some situations, they will even bark quite often if they sense something nearby or attack someone. 
The body language of a German shepherd may frequently reveal whether or not they are barking in some kind of aggressive manner. You will observe they have elevated hairs on the back, for starters. Besides that, they will approach the danger and may even jump at a higher level or against any window if they sense something.
It is also possible that your German Shepherd is barking because he is hungry. This form of barking occurs when the dog is supposed to be receiving meals, for instance, during the morning. You may rectify this by training your pet to sit down and only start eating after you instruct him.
It is possible that your German Shepherd has suffered an injury. In such cases, he might be barking to alert everyone to the fact that he is in severe pain, or he might just be irritated.
You will probably notice other signs, including limping, and the howling will be spontaneous and in places where he would not ordinarily bark.
Also, several German shepherds might develop a brain disorder related to dementia while they get mature. It can drive your dog to bark without any apparent reason, even though they have never done the same before. If you suspect that is the case, you should rush him to the veterinarian.
Note: Dementia can lead to behavior changes loss in memory in German shepherds. 
How to Stop a German Shepherd Barking?
- Give Him Lots of Exercises
- Get His Attention towards You
- Reward Compliance
- Socialize Him from an Early Age
- Ignore Attention-Seeking Barking
- Easier To Prevent Barking Before It Starts
- Use a Certified Trainer
1. Give Him Lots of Exercises
The first thing you should do is help ensure that your German Shepherd is receiving plenty of exercises.
If he is not receiving enough exercise, then helping him to release his pent-up energy will help him feel good and minimize his destructive behavior. It will also reduce the amount of barking he does.
You may discover that the exercises you are providing are not sufficient; in such cases, you will need to come up with strategies to make their play session more challenging.
If you realize that walking alone is not sufficient to exhaust your pet, then you must try to improve its effectiveness. It could be accomplished by walking faster, longer, or even in hilly terrain, or by making your pet wear a canine weighted vest with no more than 10% of his overall weight.
You might also take him on a walk with some other canines, as this will allow him to burn more calories by interacting with them.
It is also possible to train him to play fetch game. It is a useful approach to offer your German Shepherd a fair amount of action because it requires lots of running with a little break in between.
Training him to swim is another choice. It is an excellent approach to exhaust him quickly as it will utilize a huge amount of energy, waving its limbs around enough to stay above water. It is also great during the summertime as it keeps the dogs cool. If you do not have enough time to train your pet, you can hire a dog trainer for this purpose.
2. Get His Attention towards You
The next step is to teach your dog to seek permission for instructions before he begins barking. It would perform effectively if you are doing it before your pet starts barking rather than after he starts to bark excessively. To accomplish this, you will have to acquire some treats or snacks that your German Shepherd enjoys, and then you would have to grab his attention and reward him when you believe he is going to bark.
You might assume you are praising him for when he is going to bark, but what you are really doing is encouraging him to look at you first before attempting to bark.
If you are doing it after he begins barking, you will really need to grab his attention and reward them with a delicious treat. You should keep doing this until your dog stops barking. You can watch the video below or download it to learn how to train your dog.
3. Reward Compliance
When teaching your German Shepherd to not howl, it is essential to praise and treat him if he does whenever you want him to. It indicates that if you are in a scenario in which he would usually bark but not because of the instruction mentioned above, you must praise him for it.
4. Socialize Him from an Early Age
It is essential to begin socializing your German Shepherd as soon as possible. It will assist to minimize his aggressive behavior and anger while you are around other canines, as well as the amount of barking it does as a grownup. 
5. Ignore Attention-Seeking Barking
If your German Shepherd is howling just for your attention, then the smartest thing you can do is to avoid him whenever he is barking without any motive, and then give him a treat him once he as gone quiet for a bit. It will teach him the concept that barking will not get him what he wants, but staying silent will.
It is important to remember that while he is barking for your attention, you should totally overlook him and not scold him, as even unwanted attention will give him what he wants.
Did you Know?
German shepherds can even bite if you ignore them for a longer time
6. Easier To Prevent Barking Before It Starts
When instructing your pet not to bark, keep in mind that stopping him from howling by paying enough attention towards you is often successful than encouraging him to listen carefully to you after he has finished barking.
When instructing your pet not to bark, keep in mind that stopping him from howling by paying enough attention towards you is often successful than encouraging him to listen carefully to you after he has finished barking. You can tell when your German shepherd is going to bark by focusing on his body language, facial expressions, or if the event that prompts him to bark, like someone is staring at your dog or trying to come closer to him.
7. Use a Certified Trainer
If you are having trouble getting your German Shepherd to stop barking, then hiring a professional trainer might be a sensible move. They would have enough expertise with the situation and will also be able to properly determine the ideal training method for your German Shepherd.
GSDs are not the type of canines that can be handled with force. When you attempt to use power to handle them, they respond with aggressiveness. If you notice that your German shepherd is barking excessively, then the first thing to stop is to figure out what is causing it. After you have figured out what is causing it, you should work to prevent it with your best efforts. Have some patience and understanding while you handle your pet’s barking behavior.