Hardware involves the reticulum,(second stomach) The reticulum acts as a trap for foreign objects. A sharp object in the reticulum can travel toward the lung cavity, where it can create a condition almost identical with pneumonia. An animal suddenly davelopes a lack of appetite, a drop in milk production, abdominal pain, and/or a slowness in movement. A symptom is when they walk downhill they'll grunt as if in pain, which they are. The temp. is slightly elevated, there may be shallow breathing, the pulse is increased, and often will kick at their stomach. Run her up on an elevation with her front feet and let her stand there for a while and see if she acts more relieved. I would stick a magnet in her and cut back on her feed for awhile and keep giving antibiotics to control infection. Had one once, we put her in chute stuck magnet in her and she walked out as if nothing was wrong. Went right to bunk and started eating, so treatment can be pretty dramatic. Good luck with her.