if you put it to 2x, she'll also EAT faster... but you haven't got the food yet for her to eat

Found a brown mushroom.12 Food now
This is getting better now.

Maybe I'll leave the game to pause until she get enough food for 9 year
You are right mushroom still appear even if the game is paused

It'll just take patience and faith

How many foods I should need before unpausing the game?

well you once you're going to keep hunting for mushrooms you could unpause it (and run it at 1/2 speed). If it gets down to 8-10 points of food in the food bin, then it's emergency time and I'd pause it again then till you find another mushroom or two Good luck!

I found another brown mushroom.20 foods altogther
Where are you Red mushroom?

I found another brown mushroom.28 foods altogther
It is looking good But. . . . where that red mushroom

I found another brown mushroom.36 foods altogther
WOW! Mushroom appear again and again but still . . . .
where the red mushroom

44 foods
Oh well I'll forget about red mushroom