Anything you give them.
You buy food for your monster at the 'Gross-ery Store', then when you get home, check your Treasure Chest and find the food, then drag it to your monster and it will eat it.
If you are looking at improving the health level of your monster, the best food for your monster is a Roarsberry Cheesecake. If there are no Roarsberry Cheesecakes at the Gross-ery Store, wait 15 minutes and go back in (stocks change every 15 minutes) .
eat
I dont' think you get anything because there is no such a thing as rare food on moshi monsters
this is a very long song but... moshi moshi moshi moshi moshi moshi monsters monsters moshi moshi moshi moshi moshi moshi monsters monsters moshi moshi moshi moshi moshi moshi monsters monsters moshi moshi moshi moshi moshi moshi moshling moshling moshi moshi moshi moshi moshi moshi moshi moshi moshi moshi moshi moshi monsters monsters moshi moshi moshi moshi moshi moshi moshi moshi moshi moshi moshi moshi monsters monsters moshi moshi moshi moshi moshi moshi moshi moshi moshi moshi moshi moshi monsters monsters moshi moshi moshi moshi moshi moshi moshi moshi moshi moshi moshi moshi moshling moshling.... so basikly every 4 times it says moshling moshling insted of monsters monsters.
Well to make your moshi monster fart on other moshi monsters you have to eat 17 slops and 9 cartons on sour milk !!!
They need to eat slop every time.
BUGERS
Moshi Monsters has always been Moshi Monsters.
Moshlings, let alone Chop Chop, don't actually eat - only your Moshi Monster does.
eat chocolate
There is no jail on Moshi Monsters.
Thats why its call moshi monsters
No, you can not breed monsters in Moshi Monsters.