The tail of a normal cat with folded ears is not soft, because when a cat with folded ears is sick, the tail vertebrae will slowly fuse together, causing pain, which will make the cat reluctant to move, so the tail will be stiffer. If If the tail of a cat with folded ears is soft, it may not be sick yet.
Tip:
All cats with folded ears have rickets, and rickets cannot be cured and can only be alleviated by medication. It is painful, so it is best to give the folded-eared cat chondroitin from an early age, and at the same time increase calcium supplementation.