Table 1.

Studies evaluating the effect of monensin during transition period on feed intake and rumen environment.

Study	Cows, n	Dose 1	Delivery Method	Outcomes Measured	References
Mezzetti et al., 2019	38	335	CRC 2	Rumen fluid: pH, ammonia, VFA 3, immunoglobulins, lymphocytes, myeloid cells	[19]
Schären et al., 2017	60	335	CRC	Rumen fluid: LPS, ammonia, VFA, microbiome characterization	[18]
Drong et al., 2016	60	335	CRC	Individual DMI, rumen pH, ammonia, VFA, protozoa count	[20]
McCarthy et al., 2015b	70	400 pre partum 450 post partum	Top-dressing	Individual DMI, total dry matter, NDF and starch digestibility	[21]
Mullins et al., 2012	32	400 pre partum 450 post partum	Top-dressing	Individual DMI, meal frequency, rumen pH	[22]
Fairfield et al., 2007	16	335	CRC	Individual DMI, pH.	[23]
Petersson-Wolfe et al., 2007	136	335	CRC	Individual DMI	[24]
Zahra et al., 2006	182	335	CRC	Individual DMI	[25]
Plaizier et al., 2000	16	335	CRC	Individual DMI, NDF digestibility, rumen ammonia content	[26]
Green et al., 1999	52	335	CRC	Rumen ph, ammonia, VFA	[27]

¹ Daily dose (mg/day); ² controlled-release capsule; ³ volatile fatty acids.