Eastern Alliance for Production Katahdins (EAPK) Communications Committee – Roxanne Newton
(Previously published online with EAPK: August, 20, 2023)

(Image Source: Farmers Weekly – James Crilly)
Like many sheep articles, personal experience was the inspiration for this one. And like most sheep problems, the exact cause isn’t certain, but the pattern of symptoms – photosensitivity and the sudden death of a few 7-month-old ram lambs – led to a suspected diagnosis of plant toxicity and photosensitivity exacerbated by a brutally hot summer.
Photosensitization is an inflammation of the skin and is caused by either primary sources (e.g., direct contact with photosensitizing plants) or secondary causes from liver damage caused by an accumulation of toxins. Primary plant toxicity is the most common cause in sheep and occurs either by direct skin contact or by ingestion. White sheep and those with pink skin around the eyes and mouth are more susceptible to the photosensitizing effects of toxic plants. Areas of the body with less hair cover are most often affected: muzzle, ears, eyes, udder, vulva, under the tail and even the soft tissue around the hooves. Continue reading Plant Toxicity in Sheep