Lowering dino food by specified amount

Actually the only option ticked was the Dont Require Less Than Max to Use and it was resulting in mostly random values in both cases (dodo and dilo). That’s why I’m asking here because I tried the (for me anyway) most obvious options.

EDIT: for dodo it always seems to be constant 288 as well for dilo constant 172.8 food drop when using -0.1, no matter the level or amount of food they had.