A dog wagging its tail and barking at you is a sign of happiness and excitement. You should also judge based on the actual situation. Some dogs will wag their tails and scream when they are aggressive. You should judge what the dog means based on the specific situation at that time.

When you see a dog wagging its tail and screaming, parents can judge the dog's mood based on the actual situation. If the dog shakes its head crazily and shows excitement, you can try to touch it. If If the dog does not resist and still enjoys this action, it means that the dog is in a good mood and welcomes you. If your dog wags its tail and screams at you while also baring its teeth, parents should be careful. The dog may attack you. At this time, you can try to touch the dog to see if the dog means to attack you. If not, it may be that the dog expresses its emotions in this way. If there is a reason, you need to find the reason why the dog behaves like this. Generally, dogs will not be aggressive towards their owners. Parents should think carefully about why the dog behaves like this.