Calf Respiratory Health at Weaning

Weaning piles stress on a calf all at once. That is exactly when respiratory disease tends to show up, so the plan has to start well before the calves leave their mothers.

Key points

Weaning stress opens the door to respiratory disease.
Check calves daily for appetite, breathing and attitude.
Plan vaccines with your veterinarian and keep records.
Low-stress handling and good pens protect calf health.
Review each weaning with your vet and write down what to change.

Why weaning is a risky time

At weaning a calf loses its mother and her milk, may change feed, is handled, sorted and often hauled, and is mixed with calves from other places. Each of those things taxes the immune system. Disease germs that were already around get their chance.

Bovine respiratory disease is the broad name for pneumonia and related problems in cattle. It is one of the leading health problems for calves around weaning and shipping, and it is a main reason for vaccination programs and low-stress handling.

Cattle that are healthy going into weaning cope far better than cattle that are already thin, wormy or carrying sickness. Good nutrition and herd health all year feed into the weaning outcome.

Signs to watch after weaning

Check weaned calves at least once a day, and check them early in the morning when sick calves are easiest to see. Look at eyes, nose, breathing and appetite, and watch the group at the bunk.

Common signs include the following. Any of them mean the calf should be looked at closely and your vet called if it persists.

Calf stays back from the feed bunk
Droopy ears, dull eyes, head held low
Runny nose or eyes
Cough, fast or labored breathing, belly breathing
Standing with neck stretched out
Fever as measured by your vet or under vet guidance

Plan the vaccination program with your vet

A vaccination program is most useful when calves have time to respond before the stress of weaning. Your veterinarian can recommend which vaccines suit your herd, when to give them and how to handle booster doses. Timing differs by operation and by calf history.

Follow label directions for handling and storing vaccines, and record the product, date and animal for each calf. Buyers and preconditioning programs often ask for those records.

Handling and low-stress weaning

Quiet, patient handling reduces stress. Beef Quality Assurance teaches low-stress handling methods that cut down on shouting, hot shots and rough sorting. Calm calves carry less risk.

Fence-line weaning, where calves can still see and hear their mothers across a fence, is one way many ranchers soften the break. Ask your extension office about the options that fit your facilities.

Feed, water and pen conditions

Calves must find feed and water quickly. Teach them to the bunk and the tank, and offer good-quality hay and a ration your nutritionist has helped you design. Skipping meals sets calves back.

Pens should be clean, dry and well ventilated without being drafty. Dust, mud and crowding all raise respiratory risk. Provide shade or windbreak as the weather calls for.

Water quality counts. Calves that dislike a new tank or an unfamiliar trough may drink too little, so check that water is flowing, clean and the right height for smaller animals.

When to call the vet and record keeping

Call your veterinarian when a calf stays off feed, has labored breathing or does not respond, or when several calves show signs together. Any treatment needs veterinary direction. Never use leftover medicines or give anything without advice.

Record each calf's signs, the date, who you consulted and any treatment. Write the meat withdrawal date and follow the label or vet instructions exactly. Responsible antibiotic use is part of protecting the beef supply.

Ask about the reasoning behind each vaccine and the timing of boosters, so you understand the plan rather than only following it. A plan you understand is a plan you will keep.

Common mistakes and what to ask

Frequent mistakes include vaccinating right at weaning without a plan, hauling and sorting calves repeatedly in the first week, mixing groups needlessly, skipping daily checks and pulling calves too late.

Ask your vet when to vaccinate, how long to hold calves before shipping and how your handling facilities could be improved. Ask your buyer about any weaning or preconditioning requirements.

A short written weaning checklist, reviewed each year with your vet, keeps good habits from being forgotten.

No vaccination plan
Repeated sorting and moving
Dusty, muddy or crowded pens
Late recognition of sick calves

When to get help: Talk with your veterinarian well before weaning about vaccines and timing, and call early when calves show cough, labored breathing or poor appetite. Ask your buyer about preconditioning requirements.

Sources and further reading

Organization homepages are linked so you can search them for current guidance on this topic.

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