Horse Mud Fever Welfare and Management

Mud fever (pastern dermatitis) causes painful skin lesions on horse legs in wet, muddy conditions, with preventive management during winter months being the most effective welfare approach.

Key Facts

Mud fever is caused by Dermatophilus congolensis and other bacteria infecting damaged, waterlogged skin
The pastern and heel region is most commonly affected, though severe cases extend up the leg
Horses with feathered legs including Clydesdales and Friesians face higher risk due to moisture trapping
Treatment requires removing scabs, which is painful, and keeping the area dry during healing
Prevention through mud management, leg protection, and avoiding waterlogged standing areas is most effective
Some horses show recurrent susceptibility suggesting individual immunological or skin barrier differences
Secondary cellulitis from mud fever can spread up the leg causing swelling, lameness, and systemic illness

Welfare Considerations

Mud fever causes significant discomfort through painful skin lesions, and in severe cases involving secondary cellulitis, can cause extreme lameness and require intensive veterinary treatment. The removal of the scabs necessary for treatment causes acute pain. Horses with active mud fever are clearly uncomfortable - showing sensitivity around affected areas and sometimes reluctance to bear weight on severely affected legs. Heavy-feathered breeds experience particular vulnerability as their feathers trap moisture against the skin. Prevention through pasture management, provision of dry standing areas, and protective barriers during the wettest periods is preferable to treating established infection.

What You Can Do

Provide dry standing areas and shelter for horses during muddy winter conditions
Consider barrier creams or leg protections during particularly wet periods for susceptible horses
Inspect horse legs regularly during winter and detect mud fever in early stages when treatment is easier
Remove scabs gently using warm water and soft cloths before applying appropriate treatments
Keep affected areas dry during healing - this is essential for recovery
Consult your vet about antibiotics for severe cases or those with secondary cellulitis