The abnormal feeling to her abdomen could be a sign of many different things, or could be normal loops of intestines/other organs. Other possible causes for these symptoms could include enlargement of her liver/kidneys, etc or possibly a mass/tumor.
I would recommend having Loki seen by a veterinarian so that they can perform an examination and palpate her abdomen. They can discuss the need for additional diagnostics such as abdominal x-rays or systemic bloodwork. Depending on the results of these diagnostics they can recommend other treatments.