Gastric stomach cancer?

Hi...my Dad was diagnosed with a malignant stomach tumor about a month ago. He only had trouble sleeping and eating and decided to have his stomach checked for an ulcer. Not only was it an ulcer that he had had for many years, but it became malignant. They live out of state and I went to visit for about 2 weeks, when he had a PET scan which showed it was in his bones and lymphnodes. They told him he may have about 6 mos.! It was totally shocking news for us all. Now as of this past Sat. he's on chemo through a chemo port and also many meds. Today he had his first blood transfusion since his counts are poor and calcium is high. Since starting chemo on Sat. he only tastes metal in anything he tries to eat and is very sensitive to cold things...ie: refrig, AC, water, etc. Does anyone have an experience they can share? Up until mid June we thought it was just the ulcer, but through much research we found that it is the most undectibe type since symptoms are like heartburn.