The "Positive Associative Effect" of High Protein Supplements
Glenn Selk
Drovers
As you drive across much of the country this fall you see many big round bales of hay stored for winter feed. The quality of this hay will vary a great deal. Frankly, some of it will be low in protein content and therefore low in digestibility. The micro-organisms in the rumen of beef cows and replacement heifers require readily available protein to multiply and exist in large enough quantities to digest the cellulose in low quality roughages.
The Beef Blog 