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Selecting for Longevity

A cow that stays sound and keeps calving pays back her development cost many times over. Longevity depends on structure, fertility and fit to the environment.

Why longevity matters

A heifer costs money to raise and does not pay for herself until she has weaned several calves. Each year she stays in the herd helps spread that cost. High replacement rates mean more young, lower-producing females and more money tied up in development.

Cows that last also tend to be the ones best adapted to your ranch. They hold condition, rebreed and wean a calf year after year.

Longevity is also about the people running the ranch. Keeping accurate records, handling cattle quietly and fixing facilities that injure animals all add years to the average cow.

What drives a long productive life

Several traits matter together. Reproductive soundness leads the list. Next are feet and legs that carry the cow across your terrain, sound udders and teats, a good mouth, and a temperament that keeps her calm around people and calves.

Moderation helps. Very large or very high-milking cows can wear out faster when forage is limited.

Write down what a good cow looks like on your place before you shop for heifers or bulls. A short written profile keeps you from drifting toward whatever is fashionable at the sale.

• Fertility: calves every year, bred early
• Feet and legs sound for your terrain
• Udder and teat structure that lets calves nurse
• Sound mouth and ability to graze
• Calm temperament

Stayability and other measures

Some breed associations publish stayability EPDs or similar measures that predict the chance a bull's daughters stay in the herd to a certain age. These numbers take years of data and may have lower accuracy for young sires.

Use them with your own observations. A bull's daughters on your own place are the best test, so keep track of how they hold up.

Sound feet are a good example. A cow that cannot walk to water or to grass in a dry year will not hold condition, and lameness often ends a career early. Ask your vet about foot problems that seem common in your herd.

Keeping records that show longevity

Keep each cow's ID, birth date, dam, sire, calving history and reason for leaving the herd. When you cull a cow, record why. After a few years you will see whether cows leave because of age, open status, feet, udders or disposition, and you can adjust bull choice and replacement selection.

Replacement heifers from older, productive cows deserve a close look. Heifers from cows that calved early and often are good candidates.

• Record reason for every cull
• Track age at first calving
• Note feet, udder and eye problems
• Compare daughters of each sire

Heifer development and early life

A heifer's first breeding and first calf set the pattern. Heifers that calve early in the season and rebreed on time as young cows are more likely to stay. Development feeding, health programs and calving ease management all matter, and a nutritionist or extension specialist can help plan them.

Avoid pushing heifers too hard for growth. Overfeeding can affect udder development and later performance.

Be ready to adjust. If your oldest cows leave because of udder problems, look at bulls known for udder quality. If feet are the issue, check structure in your bull choices.

Management that extends cow life

Good mineral and nutrition programs, parasite control, safe handling, clean calving areas and sound facilities all help. Dental checks and hoof trimming when needed are worth discussing with your vet. Work with your herd veterinarian on a herd health program. Keep records of treatments and follow all withdrawal times.

Handle cattle calmly. Injuries from rough handling or poor facilities shorten cow life, and safety for people matters too.

If your cows wear out sooner than neighbors' cows do, compare notes. Differences in stocking rate, forage and handling often explain more than genetics.

Common mistakes and what to ask

Mistakes include keeping cows past their useful age because of attachment, ignoring udder problems and selling the wrong cows because the market is high.

Ask the seller about the female families behind a bull. Ask your vet what problems are showing in older cows. Ask your lender or accountant how replacement costs affect your plan, since program terms and costs vary.

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