Calf Rearing
Calves
Worms in Calves — The Pot-Belly That Steals Growth
Updated 26 Aug 2026 • By Falah Nutrition Desk, Animal Nutrition Advisor
A calf with a big belly and thin backbone is not 'well-fed and lazy' — it's usually a worm colony's landlord. Roundworms in particular tax young calves, stealing feed you paid for, stunting growth you were counting on, and occasionally killing outright. Deworming on schedule is the cheapest growth feed there is.
Common Signs
- Pot belly with poor muscle and visible ribs or spine — the classic silhouette
- Rough, dull, staring coat instead of a calf-shine
- Diarrhoea or shifting dung, sometimes with visible worms
- Eating soil, licking walls; slow growth against its age
- Pale gums and weakness in heavy burdens; occasional colic
Possible Causes
- Worm eggs picked up from contaminated floors, feed and water fouled with dung
- Some worms pass from the dam to the calf early in life — why young calves aren't spared
- Damp, dirty calf pens keeping the egg cycle spinning
- Overcrowding many calves on the same small soiled patch
- No deworming schedule, or one-off dosing without follow-ups
What the Farmer Should Check
- Age and dates: has this calf been dewormed at all, and when?
- Belly-vs-backbone: pot belly with poor topline?
- Dung: consistency, any visible worms after dosing?
- Pen hygiene: is dung removed daily, feed and water kept off the fouled floor?
- Are several calves in the batch showing the same picture?
Feed Guidance
Deworming schedules for calves are set by your veterinary doctor — typically beginning in the first month and repeating at intervals through the first year, with product and dose matched to age and weight; follow that plan rather than guessing, and note each dose in the diary. Around deworming, your levers are hygiene and feeding: pens cleaned daily, feed and water raised off the floor, damp corners fixed — otherwise the calf simply reinfects from its own environment. Feed-wise, a dewormed calf is suddenly free to grow: calf starter from day 4 onward, clean water, and consistent feeding turn the worm-tax refund into visible weight. The starter-plus-schedule combination is how 5-month calves reach their proper size.
Relevant GOKA Products
Calves (Cow & Buffalo)
Rapid growth - up to 200 kg by 5 months
When to Contact a Veterinary Doctor
A very pale, weak or colicky calf may carry a dangerous worm burden — dose and treatment must come from the veterinary doctor, especially in small, young or sick calves.
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