Feast - This essentially means "to eat".Originally Posted by erika
The animals were feasting.
The animals were eating.
What were they eating? They were eating lots of good food.
The animals were feasting on lots of good food.
feast - can take an object or not take an object - It works the same as "eat".
Oftentimes "on" follows "feast". - phrasal - feast on
It's also an idiomatic expression
feast (one's) eyes on