Really cool game. Especially the writing is one of a kind and I mean that in the best way possible. I hope you'll continue working on it.
To everyone having trouble with the cat feeding bug: find the file groceries.rpy in the game folder and open it with a (proper) text editor. Find line 334 which says
if has_item("cat_food"):
and change it to
if has_item("cat_food") and biscuit_has_food:
(Make sure you don't change the indentation or anything else. You will break things if you do.)
Bam. Bug fixed. Or worked around. Whatever.