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A cow that has stopped chewing cud has a rumen that has slowed down or stopped. The usual causes are simple indigestion after a feed change, grain overload (acidosis), bloat, or a fever from an infection — and in fresh cows, milk fever or ketosis. Loss of cud chewing (rumination) is one of the earliest warning signs of illness in cattle and buffaloes: treat the first 24 hours seriously, give rumen-friendly first aid, and call your veterinarian if she is also off feed, bloated, feverish or down.
A healthy cow ruminates for roughly 7–8 hours a day, mostly while resting, and each cud bolus is chewed dozens of times. This chewing produces large amounts of saliva, which is the rumen's natural buffer — it keeps rumen pH stable so the microbes that digest fibre can work. When rumination stops, saliva flow drops, acidity rises, digestion stalls and the cow slides into a cycle of poor appetite, dung changes and falling milk yield. That is why farmers have always judged cattle health first by the cud.
The most common cause. A sudden switch of fodder, mouldy or spoiled feed, very lush young grass, or irregular feeding times upsets the rumen microbes. The cow eats less, dung becomes loose or scanty, and cud chewing stops for a day or two.
Too much concentrate, kitchen waste, flour-mill by-products or accidental access to the grain store makes the rumen acidic. Signs range from dullness and reduced cud to severe illness. Read our full post on ruminal acidosis (SARA) in dairy cattle.
A left-side swollen belly with discomfort means gas is trapped — common on lush green fodder and legumes, especially in the monsoon. Bloat is an emergency when severe. See green-fodder bloat: causes and prevention.
Almost any fever — haemorrhagic septicaemia, ephemeral fever (three-day sickness), mastitis, foot-and-mouth — switches rumination off. Check the temperature (normal is about 38.5–39.2°C / 101.5–102.5°F); a hot, dull, non-ruminating cow needs a veterinarian, not home treatment.
In the first weeks after calving, milk fever and ketosis both stop rumination. A recently calved cow that stops cud chewing should be seen quickly.
Cattle that swallow wire, nails or plastic may stop ruminating, grunt, and stand with an arched back. Only a veterinarian can manage this.
Most simple indigestion cases start ruminating again within 24–48 hours. If cud chewing has not returned by then, or the cow is getting duller, stop home management and get a clinical examination.
Loss of cud for up to 24 hours with normal temperature and dung is usually simple indigestion. Beyond 24–48 hours — or with fever, bloat, no dung or a down cow — it needs veterinary attention the same day.
Stop grain, give dry fodder and clean water, and use a herbal rumen stimulant such as Cattle Remedies Ruminova to support appetite and rumen movement. Avoid forcing oils or salts down the throat without veterinary advice — faulty drenching can cause pneumonia.
Yes. In fresh cows it often signals milk fever, ketosis or uterine infection rather than simple indigestion. Have her examined promptly, and support her through the transition period with proper feeding and minerals.
This article is general educational information and not a substitute for veterinary care. Fever, severe bloat, suspected poisoning, hardware disease and any down animal are emergencies — contact a qualified veterinarian immediately. Cattle Remedies products provide herbal supportive care alongside good feeding and veterinary management.
