Large shaft

Hi. One of my chinchillas is having unusually (at least I think its unusually) large shaft. I can't really recall if he has been always like that, I just started paying attention to it lately. Compared to my other chin, the shaft is noticeable bigger and it somehow "hangs down", when the chin is walking he almost always touches the ground with it.

We went to our exotic pet vet which we know is very experienced with chinchillas, he examined the penis for hair rings and any worrying sings...

Large shaft