SOP for Dorking toes and tail
TOES: " five on each foot, front and fifth toes moderately long and smooth, fifth toes well separated from fourth and directly above it, rising in an upward curve from base to tip."
This is the ideal. Sometimes they curl either out or in. As is possible, avoid those that point down or that are growing in fusion with the fourth. THey are supposed to be "wee separated" as if they were not at all attached, but often there is a little bit of webbing at the base. As is possible, avoid those that are growing together in a substantial way.
MALE TAIL: "Large, full, somewhat expanded, carried at an angle of 45 degrees above horizontal." In short, they have a typical European cock's tail.
FEMALE TAIL: "Moderately long; carried at an angle of 35 degrees above horizontal. Main tail feathers--broad." Traditionally the tail of the female is folded fairly tightly such that it is broader at the base that at the tip. It isn't fanned like a Leghorn female.
All of this works with back line. Depending on the breed, the line of the back is compossed of sweeping gradations that avoid sharp angles, or there are angles created at the junctures of back and tail. THe Dorking has angles, the Ancona has sweeps. The tail of the Dorking rises sharply at the juncture of the back such that an angle is created.