Rule of thumb: For every degree below the lower critical temperature (LCT), a cow�s energy requirement, or TDN, increases by 1%. That�s assuming the cow is in a BCS 5 or greater.

Rule of thumb: For every degree below the lower critical temperature (LCT), a cow�s energy requirement, or TDN, increases by 1%. That�s assuming the cow is in a BCS 5 or greater.

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