>>1694Done properly, it happens not long after birth.
If it's a working dog, you might expect that the dew claws would be removed, too.
My rural friends tell me that a long tail is a disadvantage to a working dog, and has the capacity to cause problems, which docking helps solve.
So, kind of like circumcision really. A choice made by those responsible for the creature, and it really gets on some folk's tits.