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The rule of thumb for the amount of protein beef cattle need is as follows:

  • The 7-9-11 Rule: Seven percent protein for mid-gestating cows, 9 percent protein for late-gestation cows, 11 percent protein for lactating post-calving cows.
  • The 14-12-10 Rule: 14 percent protein for feeder calves weighing 550 to 800 lbs, 12 percent protein for feeder calves weighing 800 to 1050 lbs, and 10 percent protein for feeders weighing 1050 lbs to finish weight. Similar can be said for young cattle (heifers and bulls) being raised as replacements.

For dairy cows, it gets more complicated, as we have to factor in digestable intake protein [DIP] (also known as rumen degradable protein or RDP) and undigestable intake protein [UIP] (also known as rumen undegradable protein or RUP, or by-pass protein) along with crude protein content of a ration, or rather, divide crude protein into RDP and RUP. Typically, though, we should expect to feed around 10 to 12 percent protein in the form of RDP to dairy cows.

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10y ago
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14y ago

For beef cows, crude protein requirements is 7-9-11: 7% in mid pregnancy, 9% in late pregnancy, and 11% after calving. Bred heifers may need supplements slightly higher than for mature cows.

For weaned calves, they should get 12.5 to 15% crude protein. Backgrounding calves (5 to 6 month old weanlings) often need higher protein than yearlings; yearlings need 12 to 11.5% crude protein in the same program. Animals finished in feedlots need 10 to 11% CP.

Young growing bulls need 13.5 to 14% crude protein.

The above is all based on dry matter.

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10y ago

None. Feed does not need a cow, but a cow does need feed!

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10y ago

Mature beef cattle require 1 oz. of salt per head per day. Requirements by younger cattle is slightly less.

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12y ago

None. Cows don't eat money.

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Q: How much feed need a cow per day?
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