Hi Steph, i feel for you i really do you sound just like my husband a month back.
I agree with Brian in as much as its no use pushing getting mad trying to force it my hubby tried that with me it just upset me more.
Like Brian said he will find his new normal, it takes us all different amounts of time, i was just like your hubby no appetite, it's so hard to remember what something tastes like only to try to eat it and its nothing like you remember, it's very depressing, the thing that changed for me was i started to get hungry out of no where i was so hungry i had to eat start with bland broth type soups and slowly he will mend.

wishing you luck...Debz