Racing in the May 6 Kentucky Oaks, Kathmanblu couldn&rsquo;t keep pace with the cream of the 3-year-old filly division, finishing sixth, 10 lengths behind victorious Plum Pretty.\r\nThere were no excuses. Nor should there be Saturday in the Grade&nbsp; 3, $125,000 Regret Stakes at Churchill Downs &ndash; except the outcome should be more favorable.\r\nDropped in class and returned to turf, a surface over which three of her five victories have come, she appears poised for one of her better efforts.\r\nThat will be needed to defeat a field that includes turf stakes winners Excited and Diva Ash, not to mention first-time turfer Bouquet Booth, who finished fifth, 6 3/4 lengths ahead of Kathmanblu, in the Kentucky Oaks.\r\nNot typically a flashy workhorse, Kathmanblu has recorded three swift main-track breezes since the Oaks, capped by a bullet five-furlong move in 1:01.60 over a tiring, sloppy surface at Churchill on June 11.\r\nIn considering how best to regroup from her poor Oaks try, trainer Kenny McPeek felt the Regret offered the most positives.\r\n&ldquo;She&rsquo;s been successful on the grass, and didn&rsquo;t have to leave town,&rdquo; he said of her base at Churchill. &ldquo;It looked like a good spot.&rdquo;\r\nJulien Leparoux rides Kathmanblu, who ran third in the Breeders&rsquo; Cup Juvenile Fillies Turf in her only start over this turf course last fall.\r\nYour browser does not support iframes\r\nMcPeek is also represented by the rapidly improving Bizzy Caroline in the 1 1/16-mile Regret. A maiden until late April, she has since won two in a row, including a first-level allowance by seven lengths May 27.\r\nImmature at age 2, she is hitting her stride, McPeek said. Manny Cruz will ride.\r\nThe wild card is Bouquet Booth, who outran her 47-1 odds in finishing fifth in the Oaks, just getting nosed out for fourth by favored Joyful Victory.\r\nAlthough unraced on turf, she is a winner on both dirt and synthetic and has trained well over the Churchill Downs grass course in recent weeks. A daughter of Flower Alley, she went five furlongs around the dogs in 1:01.40 June 2, and followed that with a similar five-furlong move in 1:01.80 June 9, co-fastest of seven on turf that morning.\r\n&ldquo;Classwise we belong &ndash; it&rsquo;s a question if she can step up to these horses on the grass,&rdquo; trainer Steve Margolis said.\r\nShaun Bridgmohan has the mount on Bouquet Booth, winner of the Grade 3 Delta Princess and Silverbulletday Stakes.