Sentence examples for a flea from inspiring English sources

The phrase "a flea" is correct and usable in written English.
It can be used when referring to the small, wingless insect that is known for its ability to jump and feed on the blood of mammals and birds.
Example: "After noticing the dog scratching incessantly, the owner discovered that it had a flea infestation."
Alternatives: "an insect" or "a parasite".