Syrup Blocks and Tubs. These generally range
from 12 percent to 24 percent CP (often about half
from NPN) and are medium in energy. (HIGH QUALITY ONES HAVE NO NPN)
Consumption of these blocks usually is very low
(typically 1/2 pound to 1 1/2 pounds a day), so higher
protein versions probably are most useful. These
products are not intended to directly supply much
supplemental protein or energy. Rather, their theoretical
function is to stimulate rumen microbes to
digest more forage and produce microbial protein,But with natural protein rather than NPN they do supply supplemental protein AND energywhich can be utilized in the small intestine. For this
to occur, sufficient amounts of at least moderately
digestible forage must be available. These feeds (WINTER ONLY WITH FORAGE....FORAGE ONLY THE REST OF THE YEAR)work best when supplied year-round, allowing
accumulation of body fat reserves that animals can
utilize during typical fall and winter decline in forage
quality and quantity. They generally will not
support high performance. DEPENDS ON YOUR DEFINITION OF "HIGH PERFORMANCE". Tubs are easy that is why they sell them, kinda of like fishing lures are made to catch fishermen not fish.
If that salt and cottonseed meal washes off I need to check the roof ;-)
I used to be a big fan of CLS and tubs until Beef Forage workshops by A&M drilled through my thick skull.