大いに食べるホビット

You can't sacrifice a Food token to pay multiple costs. For example, you can't sacrifice a Food token to activate its own ability and also to activate the last ability of Bill the Pony.
Do not eat the delicious cards. No, not even for second breakfast.
Some spells and abilities that create Food tokens may require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won't resolve. You won't create any Food tokens.
If you cast this spell, you choose how many and which Foods to devour as part of the resolution of the spell. (It can't be countered at that point.)
Food is an artifact type. Even though it appears on some creatures in other sets, it's never a creature type.
You may choose not to sacrifice any Foods for the devour Food ability.
Devour Food is a variant of the devour ability. It allows you to sacrifice Foods rather than creatures, but otherwise functions identically to devour.
If an effect refers to a Food, it means any Food artifact, not just a Food artifact token. For example, you can sacrifice Lembas, an artifact card with the Food subtype, to activate the last ability of Bill the Pony.
The comparison of power is done only when blockers are declared. Decreasing the power of a creature blocking Feasting Hobbit or increasing the power of Feasting Hobbit after this point won't cause Feasting Hobbit to become unblocked.