Kweichowensis with nonstraight tails

[newtron]

Hi a few of my kweichowensis are healthy and happy but back of their tails are not straight. instead the top part slopes down and forms a small c at the end of the tail. is this a sign of disease? inadequate nutrition? stress?

 

[Viv]

I don't think that it is a disease or anything. Could you provide a picture? I don't know if this helps but my newts are a little like that except it doesn't look like a c. Hope this helps