That page contains a graph on "Cost per pound of protein.
Table 2 shows per-pound price comparison of actual NATURAL protein in supplements (interesting that all the nutritionists I know include only that portion of the NPN that can be utilized by the ruminant. For comparison purposes SUBTRACT the NPN from the natural protein source--anyway we aren't discussing NPN here

In it's enterity this was an excellent article. I have kept it for many years and I'm sad that I can't find the rest of it. I will contace WB Producer and see if I can't get the complete article.
We have many customers that have switched from cake to feeding alfalfa hay--not as a complete feed but as a supplement. On grass they feed 5 to 10 lbs. of alfalfa. The cattle also get some dry matter when feeding hay as well.
I appreciate the way Soapweed runs his outfit. In some cases, it just isn't feasible to feed hay when you are set up to feed cake.
One thing I cannot urge enough...get your hay tested



Spending $25 on a hay test can save you thousands of dollars in supplement. In Montana, in 14 years of testing hay, we only found one sample that was too low in protein that it needed something with it. 10% protein hay is good enough for range cows. Just make sure you feed enough of it.