Kittens usually show convulsions, salivation, dilated pupils before death, and then die. However, different causes of death have similar body reactions. For example, if a cat dies due to hypoglycemia, the cat will not have any violent reaction before death and will die smoothly. Of course, pet owners still need to take careful care of their cats when raising them. If there is any abnormality, it is best to take the cat directly to the hospital for treatment to prevent the cat from having an accident.