Symptoms of depression in female cats after sterilization include: loss of energy, loss of appetite, no interest in the owner’s teasing and previous favorite toys, and likes to stay in quiet corners and does not like to be disturbed. After a cat is sterilized, the changes in hormones in the body will affect the brain nerves, and the physical pain will cause depression. The owner needs to comfort the cat more after the cat is sterilized, spend more time with it, or take it out for a walk. Stimulate its curiosity and relieve depression.