A Holstein cow at approximately 40 days of lactation is not producing milk. The medical history reports a normal calving, mild postpartum ketosis, and a recent hoof pathology that has already been treated. Upon clinical examination, the animal appears lethargic, with poor body condition (BCS 2.5), kyphotic, and with pronounced paralumbar fossae and poor ruminal fill. Mild hypothermia; the uterus is normally involuted.
Auscultation excludes cardiac or pulmonary pathologies. There is a total absence of splashing or ruminal fermentation sounds, and upon ballottement of the left flank with a fist, the ruminal content is perceived as excessively liquid...
