The rabbit is ill. If you don't cure it, your life will be in danger. Animals can't talk, and rabbits are particularly tolerant animals. They have no expression to show where their disease is. If they have problems with excretion, appetite and spirit, they are sick.
First of all, you should see if your breeding is standardized and scientific, and then you can go to Baidu Rabbit Bar, which has rabbit breeding recipes and self-test and treatment of some diseases. If your diet is ok, you should go to a pet hospital. Rabbits have several diseases. I wonder what's wrong with your rabbit.
Explanations such as fatigue are unscientific. If you want rabbits to live a healthy life, you must reflect on your own feeding methods, learn to raise them scientifically, and go to a special hospital for examination and treatment.