健は白い犬を飼っている。

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

white

dog (Canis (lupus) familiaris); snoop (i.e. a detective, a spy, etc.); loser; asshole; counterfeit; inferior; useless; wasteful

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to keep (a pet or other animal); to raise; to have; to own; to feed