If your dog refuses to leave the house, it may be because he is scared or unwilling to leave his safe area. The following are some suggestions that I hope will help you solve this problem:
Progressive training: Put the dog at the door of your home or on the balcony, let it adapt to the outdoor environment first, and then slowly walk outside. Increase the time and distance a little at a time until it is comfortable spending time outdoors.
Lead slowly: Use inducement items, such as dog biscuits or toys, to attract your dog to you, and then place these items at the door or on the edge of the park to let him naturally walk to the door.
Give rewards: When the dog successfully walks out of the door, give it a reward in time, such as food, toys or petting. This can help the dog reduce its nervousness, and at the same time, it can establish positive associations and gradually make it want to go out.
Change location: If your dog feels scared or uncomfortable in a particular location, consider changing locations, such as choosing a quieter park or a neighborhood without too many dogs. This helps the dog feel more relaxed.
In summary, gradual training and patient guidance are the keys to helping your dog overcome his fear of going outside. If you are unable to resolve the problem on your own, you can also consult a professional pet trainer or veterinarian for help and advice.