Check if she's running a temperature (38.5-39.3 is considered normal) it
could be that she's got a touch of mastitus or infection that's putting her off her food, so rule that out first. It could just be that she's missing her piglets (though I've never noticed any of mine do that for longer than 2 or 3 days - they're normally quite relieved to get peace from them
)
Has she been served by the boar yet ? When mine are suffering 'seperation anxiety' that seems to help take their minds off it
Almost as if it re-sets their biological clock or summit.
Poor girl, hope she's better soon - worth trying to tempt her out of the ark with melon, apples and other tasty treats too
Karen