11/04/2025
COLD-INDUCED LAMINITIS
Why winter discomfort can be every bit as serious — even when X-rays look fine
Every winter, someone says: “It can’t be laminitis — the grass is gone.”
Yet horses go pottery overnight, reluctant to turn on frozen ground, or stand shifting weight from foot to foot. Sometimes they’re mildly uncomfortable; sometimes they can hardly move. This is what we call cold-induced laminitis — and it can hurt every bit as much as the summer kind.
When the temperature drops, blood vessels in the hoof constrict to preserve core warmth. In healthy horses, that constriction reverses easily. In those with Equine Metabolic Syndrome, PPID, or a past laminitis history, circulation may already be fragile. The cold adds another layer of stress: perfusion falters, laminar tissues run short on oxygen and glucose, and the result is real pain — sometimes crippling pain — even if no structural damage occurs.
WHAT’S DIFFERENT FROM “WINTER LAMINITIS”
Cold-induced laminitis = pain and inflammation caused by poor hoof perfusion during cold snaps; may or may not involve lamellar separation.
Winter laminitis = true laminitis triggered by insulin dysregulation or sugary frosts; a metabolic event that can cause structural failure.
Both need attention, but the mechanisms differ — vascular versus endocrine.
SIGNS TO WATCH
Sudden stiffness or pottery movement after a frost
Difficulty turning, weight-shifting stance
Cool feet, inconsistent digital pulse
Improvement when warmed, or worsening during prolonged cold
Don’t dismiss it as “just the ground.” Severe cold-induced laminitis can floor a horse.
MANAGEMENT & PREVENTION
1. Warmth matters: rug appropriately, provide shelter, and keep bedding deep and dry.
2. Protect the feet: avoid frozen or rutted ground; consider hoof boots or pads for insulation and shock absorption.
3. Keep them moving: gentle, regular movement supports circulation.
4. Monitor metabolic status: EMS and PPID control are year-round priorities.
5. Treat early: if a horse shows pain, assume laminar stress until your vet says otherwise.
TAKEAWAY
Cold-induced laminitis is not a “mild winter version.” It’s a different physiological route to the same suffering. Some horses recover as soon as the weather softens; others need full clinical support. The difference lies in how vulnerable the system already is.
So when frost bites and a horse goes pottery, don’t argue over terminology — act. Warm them, protect them, and call your vet.