For ewes (assuming they have been vaccinated as lambs), a pre‑lambing 6-in-1 booster vaccination and an erysipelas vaccine should be considered. Remember, the pre-lambing vaccination has to occur at least two weeks prior to lambing to give time for antibody production and incorporation in the colostrum, but it can be administered well before that and still give effective colostral levels.
Yarding ewes close to lambing to vaccinate can increase the risk of foot abscesses in wet environments and subsequent pregnancy toxaemia. Vaccinating ewes anytime in the previous six months should act as an annual booster so consider what timing is best. Ewes will initially require two doses of an erysipelas vaccine if protection for arthritis is required and marking and weaning doses have not been given.
In addition, consider vaccinating maiden lambs/ewe hoggets at their first joining (two doses required) to protect against loss from campylobacter.