Her stance (see photo below) I would say she is having reproductive problems. Have you felt inside the vent about 1-2" just to make sure there's no egg stuck?
Feel the abdomen for bloat/swelling or feeling of fluid. Egg Yolk Peritonitis, cancer, tumors, Salpingitis and Internal Laying are fairly common in laying hens - she may be suffering from on of those conditions.
How much rice does she eat a day? It's not that nutritional, so I would probably eliminate that. Offer her normal feed (layer feed?) along with the tuna or some egg. I would also give her some poultry vitamins for a couple of days.
Keep us posted.
Feel the abdomen for bloat/swelling or feeling of fluid. Egg Yolk Peritonitis, cancer, tumors, Salpingitis and Internal Laying are fairly common in laying hens - she may be suffering from on of those conditions.
How much rice does she eat a day? It's not that nutritional, so I would probably eliminate that. Offer her normal feed (layer feed?) along with the tuna or some egg. I would also give her some poultry vitamins for a couple of days.
Keep us posted.
