The two-year-old bitch, owned and trained by doonhamer Murray Aitken, eased ahead at the second bend of a 280 metres trip to win by half a length.
Runner-up was strong challenger Flaming Patsie from Tony Hopper’s West Cumbrian kennels.
Meanwhile, there was triple success for regular Gretna trainer Mark Little over the same distance.
He took the honours with comfortable victories for Magic Sam, Magic Ozzy and Magic Dizzy.
RESULTS AND STARTING PRICES
First race (7.30) – 1, Fat Man, trap 5, 2/1; 2, Zig Zag, 3, 3/1; distance .75; winning time 17.86.
Second (7.45) – 1, Jakes Girl, 6, 1 / 2; 2, John Mac, 3, 2/1; 9.25; 17.09.
Third (8.00) – 1, Cara, 3, 6/4; 2, Flaming Patsie, 4, 6/4; .5; 17.43.
Fourth (8.15) – 1, Magic Sam, 5, 5/4; 2, Macca Tiger, 6, 5/4; 5; 17.32.
Fifth (8.30) – 1, Magic Ozzy, 4, evens./fav.; 2, Diamond Rosie, 1, 6/4; 3; 17.34.
Sixth (8.45) – 1, Rose Mary, 5, 5/2; 2, Flash the Cash, 2, 5/2; 3.5; 17.60.
Seventh (9.00) – 1, Magic Dizzy, 1, 2/1; 2, Bally Boom, 2, 6/4; 1.5; 17.68.
Eighth (9.15) – 1 Barbie, 2, 2/1; 2, Night Rascal, 1, 3/1; a head; 29.57.
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