For the Love of Benji (1977)

After Benji gets separated from his family during their overseas trip, he finds himself wandering the streets of Athens as a stray. Determined to reunite with his loved ones, he faces an unexpected challenge: unknown pursuers are on his trail, seeking a secret code tattooed on his paw from the airport. With danger looming, Benji must navigate a web of mystery to distinguish friends from foes. Will he manage to reconnect with his family and salvage their vacation, or will the chaos keep them apart forever?