The 66-year-old and his family had put posters offering a $10,000 reward near their Bel Air estate after their beloved pooch went missing earlier this month. But the search ended in sadness when Phoebe was found dead, reports a website.
"Phoebe's death has been very difficult for the family," said a source.
The actor recently revealed he was forced to sell his beloved bullmastiff Butkus for just $50 when he was a struggling actor, but bought him back for $3,000 after he sold the script of 'Rocky'.
He said, "I sold my bullmastiff Butkus to a little person. You can't use the word dwarf anymore? Let's just say a little person. I tied my dog up at the store with a sign that said a hundred bucks. I got $50 from this guy called little Jimmy."
"When I sold the 'Rocky' script, I went to see Little Jimmy and begged for the dog back. He wanted to fight me and said he was gonna kill me, he was a crazy little person. I couldn't fight him - they'd arrest me - so I offered to pay double. Anyway, $3,000 and several threats later. I ended up putting Little Jimmy in the movie 'Rocky'," he added.