A bird is most likely to "feak"...

The correct choice is that a bird is most likely to "feak" just after a meal. Feaking is a behavior exhibited by raptors where they wipe their beaks on a perch or other surfaces to remove blood and feathers after consuming prey. This behavior is important for keeping the beak clean, ensuring that it remains effective for hunting and feeding in the future.

While birds may occasionally clean themselves after taking a bath or may exhibit certain behaviors related to making a kill or breaking in, these are not as directly related to the need for beak cleanliness that follows a meal. Researchers and falconers have observed that feaking serves both a practical and instinctual purpose for raptors after they have fed.