Corkscrew tail, also known as screw tail or ingrown tail, is a vertebral malformation that commonly occurs in certain dog breeds. In this condition, vertebrae may be fused together or otherwise abnormally structured, leading to the tail taking on an abnormal shape and curvature. A horse's tail is more than a fly swatter—it's an extension of the spine and a window into musculoskeletal health. In 2025, veterinary research continues to show that crooked tail carriage may. The relationship between lameness and crooked tail carriage (CTC) in horses is unclear. The objectives of this study were (i) to determine the association between CTC and lameness; (ii) among lame horses, to determine associations between CTC and lameness diagnosis, saddle slip, thoracolumbar range. A crooked cat tail is usually either a genetic kink the cat was born with or the result of an injury that healed at an angle. When horses with. If a bone segment in the tail is broken or if two segments are dislocated, the tail becomes crooked. Many types of injury can lead to kinked tails. If she let you touch it, wags it normally and does not appear painful than this may just be a natural variation. If there is swelling, or she seems painful.