If a cow is suddenly disturbed, so as to get excited, or gets tired
and out of patience, the flow of milk may be prematurely stopped. If
this disturbance is continued from time to time, the effect will be
to permanently lessen the flow, or "dry up" the cow. Anything that
irritates a cow, while being milked, reduces both quality and quantity.
Hence, milking should be done in a quiet and orderly manner. Treat the
cow very kindly and gently, so as to gain her confidence, and be as
careful as possible not to hurt her teats by unnecessarily tearing open
any cracks there may be, or pinching any warts, and be sure to not dig
your finger-nails into the teats.