The nursing sows will have an expected service date on the servicelist, which is 5 days after weaning off the litter they are nursing. That is, if they wean their own litter, for example on the 2nd of February and then wean the nursing litter on the 14th of February, they get an expected servicedate which is the 19th of February. If a sow is in servicegroup 6 and then becomes a nursing sow, she will remain in servicegroup 6 until the next service. She will not be on the servicelist for servicegroup 6 when she is registered as a nursing sow . When she weans the litter, she will be on the servicelist in a new servicegroup.