Frank Welker was 39 in The Great Mouse Detective when he played the character 'Toby the Dog / Felicia the Cat (voice) (uncredited)'.
That was over 38 years ago in 1986.
Today he is 78, and has starred in 386 movies in total, 339 of those since The Great Mouse Detective was released.
In The Great Mouse Detective, I think Frank Welker looks: