My Sheep Is Not Eating and Acting Different: Is It an Emergency?

See your vet immediately if your sheep has any of these signs: a rapidly enlarged left flank, open-mouth breathing, grunting, tongue out, inability to stand, seizures, head pressing, circling, blindness, repeated muscle tremors, collapse, or a late-gestation ewe that is weak and not eating. Severe bloat in ruminants can interfere with breathing and may become fatal quickly. Listeriosis in sheep can also move fast, with death sometimes occurring within 24 to 48 hours after signs begin.

A sheep that is off feed for a full day, especially with depression or sudden behavior change, also deserves prompt veterinary attention. In prey species, subtle signs can still mean serious disease.

Common causes include bloat, grain overload or rumen acidosis, enterotoxemia related to high-carbohydrate intake, pregnancy toxemia in late-pregnant ewes, listeriosis, heavy internal parasites, pain, fever, toxic plants or chemicals, and complications around abortion or lambing. Cornell notes that grain overload in sheep can cause lethargy, bloat, diarrhea, dehydration, incoordination, collapse, coma, and death. Cornell also describes bloat as swelling of the upper left paralumbar fossa, often linked to lush pasture or diet change.

Late-pregnant ewes deserve extra caution. Reduced appetite, weakness, tremors, or inability to rise can point to metabolic disease such as pregnancy toxemia or calcium problems. Neurologic signs such as circling, facial asymmetry, drooling, or depression raise concern for listeriosis and need urgent veterinary care.

You can safely observe a few things without delaying care. Look at the left flank for swelling, watch the breathing rate and effort, note whether the sheep is chewing cud, and check for fresh manure and urine. If you know the sheep is pregnant, note how far along she is and whether she is carrying multiples. Also think about any recent grain access, sudden feed changes, lush pasture turnout, moldy silage or hay, deworming history, and whether other sheep are affected.

Keep the sheep separate enough to monitor but close enough to reduce flock stress if possible. Offer water and good-quality hay unless your vet tells you otherwise. Avoid pushing grain, drenching large volumes, or trying home remedies in a sheep that is bloated, weak, or neurologic, because that can increase aspiration or delay needed treatment.

Your vet may start with a farm call exam and targeted treatment based on the most likely cause. Depending on the case, that can include passing a stomach tube for bloat, antifoaming treatment, fluids, calcium, energy support for a pregnant ewe, thiamine, antibiotics when indicated, pain control, fecal testing, bloodwork, ultrasound, or referral for intensive care. The right plan depends on how unstable the sheep is, whether flock mates are affected, and whether the goal is individual treatment, flock protection, or both.

Typical 2025-2026 U.S. cost ranges vary by region, travel distance, and emergency timing, but many pet parents can expect roughly $75 to $150 for a farm call, $60 to $120 for a medical exam, $30 to $80 for a fecal test, $40 to $120 for basic bloodwork add-ons, and $180 to $275 or more for a diagnostic necropsy if a sheep dies and the cause is unclear. Emergency after-hours care, IV treatment, and hospitalization can raise the total substantially.

Prevention depends on the cause, but steady feeding changes, careful grain management, parasite control based on fecal testing and flock risk, vaccination planning, and close monitoring of late-pregnant ewes all help. Merck notes that enterotoxemia in sheep is associated with high carbohydrate intake or immature succulent forage, so ration changes should be made thoughtfully.

If one sheep is off feed, watch the rest of the flock closely for reduced appetite, diarrhea, bloat, weakness, or neurologic changes. Ask your vet whether this looks like an individual illness or a flock-level problem that needs broader testing or prevention.