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Herd Health & Disease ManagementHeifer Raising: Health Milestones by Age
Heifers are the future of the milking herd, and most of their health is decided long before they ever calve. This guide walks through what to watch and what to record at each stage of growth.
Key points
- Colostrum soon after birth and good records set the tone for the heifer's whole life.
- Check calves twice a day and call the vet early when appetite drops.
- Spread out stresses at weaning instead of stacking them.
- Breed by size and development, and keep body condition in the middle of the one-to-five scale.
- Ask your vet for a vaccine and parasite calendar that fits your herd.
Birth and the first days: set the foundation
Everything that follows depends on the first hours. A calf should get good-quality colostrum as soon as possible after birth and within the first hours of life. Dip the navel, keep the maternity area clean and dry, and make sure each calf is seen to stand and nurse or take a bottle or tube feeding from a trained person.
Write down birth date, dam, sire, birth weight if you have a scale, and how and when colostrum was given. Those few lines become the first page of the heifer's health history.
- Clean, dry, well-bedded calving area
- Colostrum fed promptly, quality checked with the tool your vet recommends
- Navel treated as your vet advises
- Identification and birth record completed the same day
Preweaning: scours, pneumonia and steady growth
Most calf trouble shows up in the first weeks as scours or breathing problems. Check every calf twice a day: Is she bright, is her ear up, did she finish her milk, is her nose clear, is her manure normal for her age?
A calf that skips a feeding is telling you something. Take her temperature if your vet has taught you how, and call early. Sick calves go downhill fast, and prompt action protects both the calf and the rest of the group.
- Appetite and attitude at every feeding
- Breathing rate and effort, nasal or eye discharge
- Hydration: skin and eye position
- Clean feeding equipment between calves
Weaning and the grouping stress
Weaning is a big change in feed, housing and herd mates. Heifers that are eating enough starter and growing steadily handle it far better than those that are barely eating solid feed.
Avoid stacking stresses. If you must wean, move, dehorn and vaccinate all in the same week, you give disease a chance. Spread the jobs out with your vet's guidance, and keep group sizes and space in line with what your nutritionist and extension office recommend.
- Confirm steady starter intake before weaning
- Keep groups of similar size and age
- Watch for coughing and loose manure after the move
- Record weaning date and any treatments
Growing heifers: vaccines, parasites and body condition
Between weaning and breeding, heifers need a feed program that supports frame and muscle without getting them too fat. Body condition is scored on a one-to-five scale, and heifers that are overconditioned can have trouble later at calving and in milk.
Build a vaccination and parasite plan with your veterinarian. Disease risks differ by region and herd, so the timing on your calendar should come from your vet, not from a neighbor or a generic chart. Note every product used, the date, and who gave it.
- Weigh or measure heifers on a regular schedule
- Score body condition and note trends
- Review vaccine and parasite plans each year with your vet
- Keep pen records of any treated heifers
Breeding age and pregnancy checks
Breed heifers by size and development more than by age alone. Your nutritionist and breed association can tell you the growth targets that fit your breed. Heifers bred too small struggle at calving.
A pregnancy exam by your vet confirms the result and gives you a chance to catch reproductive problems. The estrous cycle averages about 21 days, so mark your calendar and watch for returns to heat.
- Record heat dates and breeding dates
- Schedule pregnancy checks with your vet
- Treat any heifer with abnormal discharge as a vet call
- Move pregnant heifers to a clean, familiar group
Close-up heifers and first calving
Gestation is roughly nine months, about 280 days. In the last weeks, move heifers to a clean pen, adjust the ration with your nutritionist, and watch for early signs of calving. First-calf heifers are more likely to need help, so know when to call the vet before you reach in.
After calving, give extra attention to feed intake, udder fill, and the appetite of every fresh heifer. Do not mix them in with older cows too early if competition at the bunk keeps them from eating.
- Clean calving pen with good footing
- Calving signs and timing written on a whiteboard
- A plan for who calls the vet and when
- Colostrum ready for the next calf
Common mistakes and records worth keeping
The biggest mistake is treating heifers as an afterthought. They are an investment, and neglected groups quietly cost you milk later. Another common error is skipping records, then trying to remember which heifer was treated and when.
Use one simple system, paper or software, and keep it current. Ask each year what your heifer losses were and at what ages, because that pattern tells you where to put your attention.
- Write down every treatment, with the label withdrawal time
- Review losses by age group
- Fix the age group with the most trouble first
Sources and further reading
- Dairy Calf and Heifer Association
- Penn State Extension
- University of Wisconsin-Madison Extension
- American Association of Bovine Practitioners
Organization homepages are linked so you can search them for current guidance on this topic.