This is a difficult question to answer without knowing more about the situation. Biting can be an act of aggression or self-defense, so it's important to determine why your dog is biting. If your dog is biting out of fear or anxiety, then you may be able to correct the behavior with training. However, if your dog is biting aggressively out of dominance or territorialism, then the behavior may be more difficult to correct and could potentially pose a danger to you or others. If you're unable to correct your dog's aggressive biting behavior, then it may be best to find him a new home where he can receive the necessary training and care.