A 7-year-old Jersey cow presented for sudden anorexia and decreased milk production of 4 days’ duration. The
referring veterinarian initially treated the cow with procaine penicillin G and administration of a magnet, but
without a clinical improvement.
Physical examination findings
The cow was slightly depressed but responsive with normal heart and respiratory rates (HR 72 bpm, RR 24 rpm).
Rectal temperature was mildly increased 102.7 °F/39.3 °C. Rumen sounds were decreased in amplitude and
frequency (1 rumen contraction in 2 min). The cow presented with an arched back and tense abdomen. The withers
pinch test was abnormal—while the cow did not grunt, no ventroflexion was seen