Fertility and Body Condition

Fat cover is a simple, free indicator of whether a cow has the energy reserves to rebreed. Scoring condition at set times gives you time to act while feed changes can still help.

Key points

Body condition score on the 1 to 9 scale is a free, simple tool.
Thin cows cycle later and conceive less often.
Score at set times so you can adjust feed before it is too late.
Young and old cows need extra watching.
Ask your nutritionist for targets that fit your herd.

The 1 to 9 scale

Beef body condition score runs from 1, which is extremely thin, to 9, which is extremely fat. Scores in the middle describe cows in moderate condition. You judge by looking at and feeling fat cover over the ribs, back, hooks, pins and tailhead.

Learn the scale from a trained person, such as an extension agent or vet, and practice with a few cows. Two people scoring the same cows should land within a point or so.

Condition scoring is a skill that improves with practice. Score the same cows several times a year, and you will quickly learn what a change of one point looks like.

Why condition affects fertility

A cow uses energy for maintenance, milk, and rebuilding her reproductive tract after calving. If she does not have enough energy, her body shuts down the reproductive system to protect itself. Thin cows take longer to resume cycling and are less likely to conceive.

Overfat cows are not ideal either. They can have calving problems and waste feed.

The effect can last beyond a single season. A cow that rebreeds late calves late, and her calf is lighter at weaning, so a short feed gap can echo through two calf crops.

Thin cows resume cycling later
Thin cows conceive less often
Overfat cows risk calving trouble
Moderate, steady condition is the goal

When to score and what to ask

Many producers score at weaning, a month or two before calving, at calving and at breeding. Those times show whether the feed plan is working and give time to change course.

Ask your nutritionist or extension specialist for the condition targets that suit your herd and region. This article does not give a number because the right target depends on breed, age and system.

Use scores to sort groups. Pull thin cows into a separate feed group at weaning, when there is still time to put condition back before winter and calving.

Adjusting feed in time

Condition changes slowly. A cow that is thin at calving cannot be fixed quickly, and feeding after calving is less efficient than feeding before. Plan to have cows at the right condition by calving.

Weaning early or sorting thin cows into a separate group helps you feed them differently. Test hay and forage so you know what you are feeding.

Do not forget the weather. Cold, wet cattle burn more energy, and a cow that is holding steady in good weather can slip fast in a storm.

Separate thin cows and first-calf heifers
Test hay and forage quality
Plan feed before calving
Reassess condition at breeding

Young cows and old cows

Heifers nursing a first calf and old cows with worn teeth are both at risk. They have extra needs or reduced ability to eat. Group them for feeding and watch condition more closely.

Check teeth on older cows. A cow with worn or missing teeth will have trouble holding condition on rough forage.

Records and herd patterns

Write the scores down with the cow's ID. Over time you will see which cows hold condition on your forage and which do not. Cows that stay in good condition with little help are the ones to keep.

If most cows are thin, consider stocking rate, forage supply and the cow type you run, not just the feed you buy.

Keep a simple table with cow ID, age, scores at each time and rebreeding result. A season of those numbers will show you which cows are worth their feed.

Common mistakes and what to ask

Mistakes include judging by eye from a distance, never scoring, and waiting until after calving to act.

Ask your vet and nutritionist: What target fits my herd? Which groups are at risk? What feed plan would you suggest? Ask your extension office for a body condition scoring workshop or chart.

Ask the person who teaches you scoring to check your work once or twice, since it is easy to drift over time.

When to get help: Ask an extension specialist or nutritionist to teach body condition scoring and help you set condition targets and a feed plan. Your veterinarian can check cows that fail to rebreed despite good condition.

Sources and further reading

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

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