Horse Mud Fever: Prevention and Treatment

Mud fever causes painful skin lesions on horses' legs in wet conditions. Prevention through management and prompt treatment of established disease protect horse welfare.

Key Facts

Mud fever (pastern dermatitis) is caused primarily by Dermatophilus congolensis and sometimes Staphylococcus species
Prolonged moisture softens the skin, allowing bacteria to penetrate and establish infection
The condition causes pain, swelling, and lameness in severe cases
Pink-skinned (unpigmented) horses are more susceptible than those with pigmented skin
Prevention relies on minimizing prolonged skin contact with wet, muddy conditions
Barrier creams and careful drying protocols help protect susceptible horses in unavoidable wet conditions

Welfare Considerations

Mud fever ranges from mild discomfort to severe lameness with extensive scabbing and cellulitis. Horses with established mud fever find leg flexion painful, affecting their movement and demeanor. The chronic, recurrent nature of the condition in susceptible horses means some animals face repeated bouts of discomfort through winter months. Proactive management to reduce exposure and early treatment when lesions appear significantly reduces the cumulative burden.

What You Can Do

Provide dry, well-drained standing areas and field gateways to minimize prolonged mud exposure
Dry legs thoroughly after washing rather than leaving damp skin exposed to bacteria
Apply barrier cream or petroleum jelly to susceptible skin in wet conditions
Inspect legs regularly for early signs of mud fever: scabbing, soreness, and hair loss around the pasterns
Remove scabs gently under veterinary guidance after softening — forcible removal is painful and counterproductive
Seek veterinary advice for severe cases involving swelling, lameness, or failure to respond to initial treatment