Thanks for inform, he should one of these assistant musician who appears in the band's show.
Yes. Actually from what I know he did play on the "pigs on the wing" song in the official release "Animals". Then afterwards, was called back for the Gigs. On the Animals Tour he played the bass on "sheep", guitars on "Shine on You Crazy Diamond" as a additional guitarrist and the base guitar.
After the notorious last concert of the tour, in Montreal (July 6, 1977), the band led by Snowy played a long, sad blues as music for the people to leave to. David Gilmour had walked out of the stage.
On the Wall Tour (1980) Snowy played the main solos on "another brick in the wall - pt II" and base guitars, jamming with Gilmour in some tracks. In 1981 he was replaced due to a contract with another band.
https://youtu.be/xBQsQoGodPY