hi sorry to read about your dad. i understand what you are going through. i have a similar situation with my dad as the list of what he can't eat is growing longer by the day. my mum is very frustrated with him desperately trying to get him to eat..alot of his favourite foods he cant seem to eat. also because he doesnt feel hungry because of the tumour he has to be reminded to eat.everyone takes high calorie foods hoping to tempt him but it is getting harder he does have the shakes from the doctors but this takes him about 3 hours to drink and he is going off them mums  lucky if she can get him to have 1 in a day.at the moment he does enjoy a glass of baileys in the evenings .at the end of the day we cant force someone to eat and it only ends up a battle

try to stay strong for him and your mum and enjoy the time that you have left with him that s what i am trying to do. xx