Down Cow: Emergency Causes, First Steps & When to Call the Vet

A cow may go down because of a metabolic problem, calving-related injury, severe infection, toxin exposure, or prolonged recumbency itself. In dairy cattle, one of the best-known causes is milk fever (hypocalcemia) around calving. These cows may be weak, cold-eared, trembly, or unable to rise. Low magnesium, ketosis, and pregnancy toxemia can also cause weakness, tremors, depression, or recumbency, especially in fresh cows or late-gestation animals.

Another major group is post-calving trauma and nerve injury. Difficult births can damage the sciatic or obturator nerves, making the hind legs knuckle, splay, or fail to support weight. Fractures, hip injury, severe muscle strain, and slipping on poor footing can look similar. If a cow stays down too long, pressure on muscles and nerves can create secondary recumbency, sometimes called downer cow syndrome, even after the original problem has started to improve.

Serious infectious and inflammatory diseases also belong on the list. Toxic mastitis, acute metritis after calving, pneumonia, or other systemic illness can lead to shock, dehydration, weakness, and collapse. Some cows are down because of neurologic disease or toxins, such as botulism or listeriosis, especially if there is drooling, trouble swallowing, facial asymmetry, or progressive paralysis.

Because the causes overlap, it is not safe to guess at home. A cow that is bright and trying to rise may still have a life-threatening calcium problem, while a cow that recently calved may have both hypocalcemia and nerve injury at the same time.

See your vet immediately if your cow cannot stand, keeps going back down, is lying flat on her side, is bloated, has labored breathing, seems mentally dull, has a fever, has foul discharge after calving, has a hot swollen udder, or shows signs of trauma. This is also urgent if she has been down for more than a few hours, especially on hard ground, because muscle and nerve damage can develop fast.

A recently calved cow that is weak or recumbent should be treated as an emergency even if she still seems alert. Fresh cows are at higher risk for hypocalcemia, metritis, ketosis, mastitis, and calving paralysis. If she is drooling, cannot swallow well, has a head tilt, or seems paralyzed rather than painful, tell your vet right away because that pattern can change the emergency plan.

Home monitoring is only reasonable after your vet has examined the cow and given you a care plan. In some cases, your vet may recommend close nursing care at home for a bright cow that is eating, drinking, and making repeated attempts to rise. Even then, worsening appetite, skin sores, swelling in the legs, dark urine, no manure output, or loss of interest in feed are signs to call back promptly.

If you are unsure whether this is urgent, assume it is. In cattle, waiting can turn a treatable primary problem into a much harder secondary recumbency case.

Your vet will start with a hands-on exam and history. They will ask when the cow went down, whether she recently calved, how long labor lasted, what she has eaten, whether she has had milk fever before, and whether she can get into sternal position or tries to rise. The exam often includes temperature, heart rate, hydration, rumen fill, udder and uterus check, limb and hip assessment, and a neurologic look for tongue tone, facial symmetry, and swallowing ability.

Next, your vet will work to identify the most likely cause and any complications. Depending on the case, that may include bloodwork for calcium, magnesium, phosphorus, ketones, and hydration status, milk or uterine evaluation, and assessment for fractures, dislocations, or nerve injury. In fresh cows, your vet may treat likely metabolic disease right away while continuing the workup, because early correction can be time-sensitive.

Treatment often combines cause-specific therapy plus nursing support. That may include IV or oral calcium, magnesium support, fluids, anti-inflammatory medication, treatment for mastitis or metritis when indicated, and careful repositioning onto deep bedding. Some cows need hip lifters, flotation, a sling, or repeated assisted standing under supervision. Your vet will also talk with you about prognosis, because appetite, alertness, ability to sit upright, and how long the cow has been down all affect the outlook.

If the cow has severe trauma, advanced shock, extensive pressure sores, or has stopped eating and trying to rise, your vet may discuss humane euthanasia. That conversation is never easy, but it is part of good welfare planning for a recumbent cow.

Home care for a down cow should happen with your vet's guidance, not instead of it. The priorities are footing, bedding, hydration, and preventing secondary injury. Keep her on deep, dry, well-bedded ground with enough traction to avoid leg splaying. If possible, keep her in sternal recumbency rather than flat on her side, because that helps breathing and lowers bloat risk.

Turn or reposition her regularly, following your vet's instructions, to reduce pressure damage to muscles, nerves, skin, and lungs. Protect the legs from slipping and avoid pulling on the head, tail, or limbs. If your vet recommends assisted standing, use the exact method and schedule they give you. Poorly timed lifting can do more harm than good.

Offer clean water and feed only if she is bright and swallowing normally. Keep her sheltered from heat, cold, and rain. Watch closely for bloat, swelling, sores, dark urine, no manure output, worsening weakness, or loss of appetite. Those changes can mean the case is becoming more serious.

Many pet parents want to keep trying, and that is understandable. Still, comfort matters. If your cow becomes dull, stops eating, develops skin sores, or no longer attempts to rise, contact your vet promptly to reassess the plan and discuss the most humane next step.