Dry cow antibiotic therapy (DCT) is the administration of long acting intramammary antibiotics at the time of dry-off. This practice gained widespread implementation in the 1960s as part of the ‘five point plan’ in the UK and numerous clinical trials have demonstrated its efficacy in promoting udder health through the control of intramammary infections (IMI) during the dry period (Halasa et al., 2009a; Halasa et al., 2009b).
