hi my dad aged 77 was diagnosed stage 4 lung and liver cancer nearly 8 weeks ago,,he has now moved in with my wife and i,,he isnt getting any treatment,,he didnt know he had it it was through other medical problem they seen the cancer,,over the past 6 weeks he is continuing to put on weight all over and espically on stomach,is this normal.hes eating ok nothing to much more childs portions,,any advice would be very much appreciated,,hes only taking pain killers and sleeping tablets for his bad circulation in leg......hes put on nearly 13lb,,