White to pink, crusty, depigmented plaques on the inner surface of the pinnae caused by equine papillomavirus (often transmitted by black flies; Simulium spp.). Extremely common (up to 50% of horses in some regions). Generally cosmetic and non-painful, but the inner ear skin becomes hypersensitive during active infection, causing ear shyness. There is no consistently effective treatment; the condition is lifelong but benign.
White to pinkish, flat to slightly raised, crusty plaques on the concave (inner) surface of one or both pinnae; may be single or coalescing; horse may become head-shy or ear-shy due to sensitivity; plaques persist indefinitely; may come and go seasonally; NOT precancerous; horse resists ear handling; occasionally mild flaking
White to pink, crusty, depigmented plaques on the inner surface of the pinnae caused by equine papillomavirus (often transmitted by black flies; Simulium spp.). Extremely common (up to 50% of horses in some regions). Generally cosmetic and non-painful, but the inner ear skin becomes hypersensitive during active infection, causing ear shyness. There is no consistently effective treatment; the condition is lifelong but benign.
White to pinkish, flat to slightly raised, crusty plaques on the concave (inner) surface of one or both pinnae; may be single or coalescing; horse may become head-shy or ear-shy due to sensitivity; plaques persist indefinitely; may come and go seasonally; NOT precancerous; horse resists ear handling; occasionally mild flaking