Weakness of the cat’s hind legs is not necessarily feline plague. You need to observe whether the cat has other symptoms. If there is no vomiting, diarrhea, or not eating or drinking, it is not feline plague. It may be hypoglycemia, muscle damage, calcium deficiency, spinal cord injury, etc. Caused by problems, etc., you need to go to the hospital for examination. At ordinary times, attention should be paid to supplementing nutrients for cats to avoid malnutrition and calcium deficiency. Cats should also be exposed to more sunlight to promote calcium absorption.