The sudden mental illness of a dog after breeding may be caused by excessive physical exertion, viral infection, genitourinary tract infection, or pregnancy reaction. First check whether the dog has other abnormalities, such as abnormal genital secretions, burping, etc. For sneezing, vomiting, diarrhea, etc., it is best to send the patient to the hospital for examination to avoid delaying the condition. Generally, this reaction will occur 2 to 3 weeks after mating in female dogs, such as loss of appetite, poor energy, restlessness, vomiting, etc. Male dogs also need about two weeks to adjust. At this time, the dog should be given more Supplement nutrition and let your dog get more rest and sleep.