I am 73 y/o AA, retired working part time. Prostrate Cancer survivor, surgery 2010, radiation last year 38 sessions. Question: Past six months my bowel movement not normal, thick and watery at times dark or light in color. While on toilet, bowel movement are of a spraying type, with feces towards back of toilet wall. No pain just gas mixed stool. Stomac slightly bloated most of times. Please advise.