Our 1 year old sow was recently bereaved and we have introduced an 8 week rescued sow. They are currently in separate indoor cages side by side when bringing them out to a neutral space they seem to be chattering happily but after a while the older sow starts to nip at the little'un and the little'un will obviously make a loud squeak. I'm finding it hard to watch as I feel for the little'un as she just seems to want a friend.