Diagnosing and treating downer cattle (Proceedings)


Diagnosing and treating downer cattle (Proceedings)

Aug 01, 2011

A downer cow is "a cow unable to stand voluntarily". Many are periparturient and due to traumatic peripheral nerve injuries.

Sciatic nerve paralysis is seen primarily immediately after calving. Feto-pelvic disproportion produces pressure ischemia on sciatic nerve, rarely secondary to injection abscess. The clinical signs include persistent knuckling of fetlock and slight "dropping" of the hock. Weight bearing variably affected - stifle joint extension maintained by femoral nerve. A prominent patella reflex (less antagonism of femoral nerve/quadriceps). May have decreased tail tone, anal sphincter tone, atonic bladder, may have analgesia of hindlimb distal to stifle (except craniomedial aspect of tibia).

Obturator nerve paralysis is seen primarily immediately after calving. Feto-pelvic disproportion produces pressure ischemia on obturator nerve (and more commonly on the L6 branch of the sciatic nerve!!). Clinical Signs are inability to adduct the hind limbs, tendency for abduction when standing, particularly on concrete or ice. May lead to dislocated hip, can support weight when hind legs are placed in normal position. Treatment should include hobbling the back legs to prevent splits (24" to 30" apart)

Peroneal nerve paralysis is seen primarily in cattle immediately after parturition or prolonged recumbency. Pressure ischemia over lateral stifle region (lateral femoral condyle) is the cause. Clinical Signs include hyperflexion of fetlock joint (may walk on dorsum of fetlock), inability to extend digit, overextension of the hock. There may be possible skin analgesia dorsal metatarsal area, fetlock, and digit. Treatment includes bandage, splint, or cast fetlock to prevent abrasion

Radial nerve paralysis is seen primarily in adult cattle after prolonged lateral recumbency. Due to pressure ischemia over the lateral aspect of the humerus. Clinical signs include inability to extend (bring forward) the elbow, carpus, and digits. The leg is dragged, which abrades the fetlock. Skin analgesia is present on the lateral part of leg. Treatment includes bandage, splint, or cast leg (including carpal joint) to prevent fetlock abrasion.

General treatment principles for nerve injuries include confine to dry, softly bedded box stall (sand stall is best), and reduce perineural swelling by administering dexamethasone (0.05 mg/kg, IM, every 1-2 days; preferred) or flunixin meglumine (1 mg/kg, IM, q 12 h).


Clark RG, Henderson HV, Hoggard GK, Ellison RS, Young BJ. Ability of biochemical and haematological tests to predict recovery in periparturient recumbent cows. N Z Vet J 1987;35:126-133.

Constable PD. Fluids and Electrolytes. In: Brumbaugh GW, Guest Editor, Clinical Pharmacology. Veterinary Clinics of North America, Food Animal Practice. 2003, 19(3):1-40.

Cox VS, McGrath CJ, Jorgensen SE. The role of pressure damage in pathogenesis of the downer cow syndrome. Am J Vet Res 1982;43:26-31.

Grosenbaugh DA, Gadawski JE, Muir WW. Evaluation of a portable clinical analyzer in a veterinary hospital setting. JAVMA 213:691- 694, 1998.

Gruenberg W, Constable PD, Schroder U, Staufenbiel R, Morin DE, Rohn M. Phosphorus homeostasis in dairy cows with abomasal displacement or abomasal volvulus. J Vet Intern Med 2005; 19:894-898.

Gruenberg W, Morin DE, Drackley JK, Constable PD. Effect of rapid intravenous administration of 50% dextrose solution on phosphorus homeostasis in postparturient dairy cows. J Vet Intern Med, in press, 2006.

J├Ânsson G, Pherson B. Studies on the Downer Syndrome in Dairy Cows. Zbl Vet Med A 1969;16:757-784.

Radostits OM, Gay CC, Hinchcliff KW, Constable PD. Veterinary Medicine. A textbook of the diseases of cattle, sheep, pigs, goats, and horses. 10th edition. W.B. Saunders, 2008.

Roussel AJ, Constable PD. Guest Editors, Fluid and electrolyte therapy. Veterinary Clinics of North America. ISSN 0749-0720, Volume 15, Number 3, Philadelphia, W.B. Saunders Company, November 1999, pp 242.

Shpigel NY, Avidar Y, Bogin E. Value of measurements of the serum activities of creatine phosphokinase, aspartate aminotransferase and lactate dehydrogenase for predicting whether recumbent dairy cows will recover. Vet Rec 2003;152:773-776.