robby,

Cattle eat pounds, not percentages, one thing really drilled hard into my head at college. How many pounds of protien are they getting and how many pounds do they need? I think that you will find the cases of reproduction problems come when they are a ways over the limit....To steal a line from our GOG ( Grand Ole' Guy) here, everything in moderation........

I think in most cases people tend to balance rations based on protien. in actuality, if you balance it for energy, you will almost always have enough Protien....Something that has been my fairly quiet soapbox....protien is so drilled into peoples heads it isn't worth the effort to drill it out, LOL....

Hope you enjoy a great Prime Rib tommorrow,

PPRM