'TDN Rising Star' Shirl's Speight (Speightstown) is no longer being pointed to the GI Kentucky Derby after developing a cough Saturday. "Unfortunately, Shirl's Speight has come up with a minor cough today and he will not be going to the Kentucky Derby," owner/breeder Fipke Stable tweeted. "His health is our number one concern, and we'll look forward to his next race." "He's coughing and full of mucus so we've had to put him on antibiotics," trainer Roger Attfield said. "I've had four or five of them [get sick] these last...