Milk allergy

• Cause: autoallergic reaction (anaphylaxis) to the cow’s own milk extract (casein).
• Signs: generalized or local (on the eyelids and muzzle) urticaria with or without piloerection. Other signs include dullness, recumbency, shuffling gait, ataxia, muscle tremors, coughing, respiratory distress, restlessness, tail swishing, abdominal watching, abdominal licking, abdominal kicking, vocalization and maniacal behavior.
• Diagnosis: based on history of being recently dried off or milk retention and clinical signs.
• Treatment: administration of antihistamines (if licensed in geographical location) and anti-inflammatories.
• Prognosis: good for recovery, but likely to reoccur in the future.

Geographic incidence

• Worldwide.

Age predisposition

• Mature lactating cows.

Breed/Species predisposition

• Channel island breeds of cattle (particularly Jersey Jersey and Guernsey Guernsey cattle).

Cost considerations

• Cost of treatment.

Special risks

• The cow has recently been dried off.
• Retained milk - for example show/stud cows not being milked for showing, photographing or for sale.