Silas has a funny tail. I suspect that one of the breeds he’s mixed with is either naturally short-tailed or is a breed that is usually docked. He has a few inches of chubby tail, then there’s a sudden drop off and the rest of it is skinny.
Now that he’s an adult it isn’t very obvious. Unless he’s cold, that is. Then the hair on the chubby part poofs out.
It’s like my own little thermometer.