The reasons why dogs like to bark in the morning may be due to the following reasons:
Hungry: Dogs may be very hungry in the morning, so they will bark to attract the owner's attention and ask for food.
Need to eliminate: Dogs may need to go out to eliminate in the morning, and they may bark to alert their owners.
Loneliness: If a dog is used to being with its owner and the owner leaves the house in the morning, the dog may feel lonely and anxious and bark for comfort.
Pain or discomfort: Dogs barking in the morning may be because they are in pain or discomfort and need help from their owners.
In short, the reason why a dog barks in the morning may vary depending on the dog’s personality, situation, environment and other factors. If your dog's barking becomes too frequent or unusual, it's recommended to take him to the vet to check for a medical problem.