Nutrition for Calving Cows

The last part of pregnancy is when a cow's needs climb fastest, and what she eats then affects her calving, her colostrum and how quickly she rebreeds. Planning ahead is far cheaper than fixing problems later.

Key points

Late gestation is when needs climb fastest, so plan early.
Condition score on the 1 to 9 scale and sort thin and young cows.
Test forage; do not guess what the hay supplies.
Avoid both underfeeding and overfeeding before calving.
Make sure every calf nurses and call the vet if it does not.

Why late gestation matters so much

The calf does most of its growing in the final stretch of a roughly nine-month gestation, and the cow is also preparing to milk. Her feed requirement rises while her rumen has less room, because the calf and uterus take up space.

That means the feed has to be better, not just more of it. A cow that enters calving in the right condition has a much easier time than one you are trying to rescue at the last minute.

Aim for the right condition before calving

Beef cows are scored on a 1 to 9 scale, and most advisers want mature cows near the middle to upper-middle of that range at calving, with heifers and young cows a bit higher because they are still growing. Ask your extension specialist for the target that fits your breed, your environment and your calving season.

Score cows well ahead of calving, because it takes time to change condition. Sorting thin cows and young cows into a separate group lets you feed each group what it needs instead of overfeeding the herd to help a few.

Energy, protein, minerals and water

Energy and protein needs rise in late gestation, and a forage test is the only reliable way to know whether your hay or pasture covers them. Mineral needs matter too, especially in regions with known deficiencies. Work with a nutritionist to set a mineral program matched to your forage and your area.

Water is easy to forget. Cows that are close to calving need steady access to clean water, and frozen tanks or dirty troughs reduce intake of everything else.

Test hay and stored forage for nutrient content
Group cows by age and condition where you can
Offer free-choice minerals designed for your region and read the label
Check water sources daily, especially in cold or hot weather

Avoid overfeeding

It is tempting to push feed in the last weeks. Cows that get too fat can have more trouble calving, and an oversized calf adds to the risk. Feed to condition and need, not to reassure yourself.

Sudden diet changes near calving also upset the rumen. If you need to improve the ration, do it gradually and with advice from a nutritionist.

Cold, wet weather raises a cow's energy needs, so a ration that looked right in fall may fall short in a hard winter. Watch condition and the weather together, and adjust with your nutritionist rather than by habit.

Colostrum and the first days

A well-fed cow is better prepared to produce good colostrum, which the calf needs soon after birth. Watch each pair to make sure the calf nurses. If a calf has not nursed or a cow is not letting down milk, call your veterinarian rather than waiting.

Keep records of calving dates, cow condition at calving, any assisted births and calf vigor. Those notes help you adjust next year's feeding and show which cows deserve a place in the herd.

First-calf heifers deserve extra attention at this stage. They are more likely to need help, and a heifer that is fed well and kept in a calm, well-lit area close to the barn is easier to watch. Know in advance when you will call your vet for a hard birth rather than deciding in the middle of the night.

What to ask and common mistakes

Ask your nutritionist how your forage test compares with the needs of cows in your calving group, and what to do if hay turns out lower in quality than expected. Common mistakes include never testing forage, treating every cow the same, changing feed abruptly, and neglecting water and shelter during bad weather. Any feed additive or supplement should follow the label and your vet's guidance.

A practical weekly routine in the calving lot

Once cows begin calving, walk through them at regular times and write down what you see. Look at appetite, udder fill, how cows move and who is separating from the group. Keep feed delivery steady, because changing the time or place unsettles cows that are close to calving.

Make sure bunk or feeding space is generous so shy or younger cows eat their share, and keep the calving area clean, dry and well bedded where the weather calls for it.

When to get help: Work with a nutritionist or extension specialist to write a late-gestation ration from a forage test, and call your veterinarian if a cow struggles to calve or a calf fails to nurse.

Sources and further reading

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

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