Pastern dermatitis, often referred to as "cracked heels," is an inflammatory skin condition that affects the lower legs of horses, specifically the heel, pastern, and sometimes the fetlock and cannon bone. This condition can stem from various factors, including physical trauma, as well as bacterial, fungal, or parasitic infections. Other colloquial terms for this ailment include "scratches," "greasy heel," "mud fever," "mud rash," and "dew poisoning," all pointing to a similar presentation of skin inflammation and irritation in the equine lower limbs.
The root cause of pastern dermatitis is often traced back to prolonged exposure to excessive moisture on the skin of the lower legs, which can lead to chapping, cracking, and subsequent vulnerability to infection. Environmental factors like muddy conditions, wet pastures, unhygienic living spaces, and damp bedding significantly contribute to its development. Horses with abundant leg feathering or white lower legs, such as Clydesdales, Gypsy Vanners, and Friesians, are particularly susceptible due to the increased difficulty in keeping these areas dry. Symptoms range from mild irritation, redness, and itching to severe cracking, crusting, oozing, and even lameness. Diagnosis is typically made through a physical examination, with further tests like skin scrapes or biopsies conducted if an infection is suspected to identify the specific pathogen.
Effective treatment and management of pastern dermatitis prioritize creating a clean and dry environment for the horse, including keeping them out of wet areas and ensuring stalls are regularly cleaned and re-bedded with dry material. Initial mild cases can often be managed by gently clipping excess hair, especially feathering, cleaning the affected area with an appropriate antiseptic, and applying antimicrobial shampoos as directed. Prompt drying of the area after washing is crucial. For persistent or severe cases, veterinary intervention is essential, as systemic antibiotics, anti-inflammatories, antiparasitics, or steroids may be required. Prevention is key and involves maintaining excellent lower leg hygiene, allowing horses to graze after dew has dried, and diligently cleaning and drying legs after turnout in wet conditions. Supporting skin health through dietary supplements can also aid in recovery and prevention.
Addressing equine pastern dermatitis demands a proactive and compassionate approach, underscoring the profound connection between a horse's environment, hygiene, and overall well-being. By diligently maintaining clean, dry living conditions and seeking timely veterinary care, horse owners can ensure their animals lead healthy, comfortable lives, free from the discomfort of this common ailment.