A 5-year old Simmental cow who is used as a donor for embryo transfer is evaluated because of the acute onset of anorexia and lethargy. She has been flushed six times; the most recent flushing occured 10 days ago. Rectal temperature is 104*F . During PE, the cow is reluctant to move and periodically kicks at her abdomen. On rectal palpation, the left kidney is grossly enlarged and has a smooth texture. When stimulated to urinate, the urine is grossly hematuric; numerous blood clots and fibrin are present. Which of the following is the most appropriate treatment?
a. Administration of gentamicin intravenously
b. Administration of procaine penicillin G intramuscularly
c. Long-term catheterization of the bladder
d. Surgical removal of the enlarged kidney
e. No treatment is indicated