so fast 12th liao................ CONGRATZ!

you can buy one pack prestige and mix with the old food, because it takes forever to finish one pack *at least for me*

Else, just switch to prestige, like me. The "junk" food that I bought before I able to get Prestige sleeps there in the cabinet XD

I left my XB for a week before. I left a full mountain and there is left over. But again, like odd_mochi says, it depends on how much of your hamster eat.