Short spine syndrome is a very rare congenital defect. Part of awareness Tilly raises is to never breed dogs with short spine syndrome.
Here is more Tilly:

Short spine syndrome is a very rare congenital defect. Part of awareness Tilly raises is to never breed dogs with short spine syndrome.
Here is more Tilly:

It sort of looks like an intellect devourer: https://forgottenrealms.fandom.com/wiki/Intellect_devourer
Heh, totally!