The belly to be white but teat spots permissible.
This fact sheet covers the National Mastitis Council recommended milking procedures; milking order; teat dips; and treating clinical mastitis.
The volumes are not critical - a single squirt from a teat pipette will be accurate enough.
Those who have a very slow pulse teat is very weak may have itching on various parts of the body surface.
The tube can then be slipped over the blunted needle to give a fine teat.