Michael Jackson was apparently convinced his chimpanzee Bubbles had an instinct for being able to tell who in his family was trying to live off his fortune.
The late star is said to have barred siblings from his Neverland ranch if the pet did not like them.
Michael reportedly told staff: "He is a good judge of character."
A former housekeeper told The Sun
: "Bubbles often would be a gauge for Michael to decide who should stay and go."
The revelation comes around the time that the performer's family endure an argument over his millions, three years after his death in Los Angeles aged 51.
His ex-employee said Michael would react to Bubbles response to his various relatives. He would say: "They are only after my money."
Brothers Jermaine and Randy were said to be among those regularly snubbed.