Intramammary antibiotic per vet. Higher single-course cure rate for an established infection — but under NOP rules Reba can never return to organic production. She would move to the conventional string or be sold.
Organic premium lost
−$2,104
$6.34/day × ~332 productive days at 56 lbs/day
Success odds
~85–90%
LEDGER note: under NOP §205.238, a producer may not withhold medical treatment from a sick animal to preserve its organic status. If organic-approved interventions fail, treat — and record the transition. The economics above exist so you decide early, not so you decide never.