As a fan of the bobbed tail and polycaudal mutations, I had an idea for a tail mutation that could be passed naturally.

The tail would bend at an unnatural angle, and would be visible from birth. Here's a link to an example of what a kinked tail would look like.
https://www.researchgate.net/profile/Madelon_Kerk/publication/273968104/figure/fig4/AS:294756476309509@1447286828219/The-kinked-tail-of-a-Florida-panther-on-the-left-and-an-x-ray-of-a-kinked-tail-on-the.png

The idea for this mutation came from the Florida Panther (an endangered cougar subspecies), which used to have a lot of genetic problems like heart defects after the population was reduced to a point too low to maintain genetic diversity. Other traits like kinked tails and cowlicked hair were also extremely common but have become less so after the crossbreeding program with Texas cougars.

To stay true to Lioden gameplay, the kinked tail would not arise as a result of inbreeding, but it can be passed naturally by both males and females. It would otherwise work just like any other tail mutation in the game.

Leave some suggestions for flavor text below if you want!