Is the hunchback phenomenon of folded-ear cats necessarily a precursor to the onset?

Not necessarily. At the beginning of the disease, cats will show inactivity, and then there will be obstacles in their movements. The obvious symptoms include limping on the hind legs, raising hands frequently, hunchback, walking like walking on stilts and so on. In addition, the cat's tail looks thick and short, and its joints are stiff and it can't swing. The bones and joints of hind limbs are abnormal, and the bones of feet are deformed and bent, which is shorter than that of normal cats. The bones and joints of the soles of the feet are swollen, and some cats' toes even become deformed and their claws can't stretch normally. The forelimbs will have similar symptoms, but the degree is lighter than that of the hind limbs. You can judge by these characteristics.