Does this mean that monensin can be offered to dairy cows only in a TMR?
No. Monensin has also been approved for use in component feed (including top dress) and therefore does not have to be offered to dairy cows only in a TMR. However, when offered in a TMR, all conditions of the TMR use would apply. Q: What if part of the cow’s diet includes grass consumed while grazing and, at the same time, the cow receives TMR that contains monensin? A: This use is not covered by the approved use of monensin in TMR systems because the “TMR” (sometimes called “partial TMR”) does not provide all feed ingredients to cows as a single mixture. Rather, this is an example of a component feeding system where cows derive nutrients from the Type C medicated feed with monensin and grazed forage from pastures (See section below on component feeding (including top dress)). Q: According to monensin labels for a TMR use, it appears that the approved monensin concentration of 11-22 g/ton in Type C medicated feed is correct only when expressed on a 100% dry matter basis; is this correc
