Conversation so far:
What was the Toby Keith Dixie Chicks feud regarding?
Toby Keith had a feud with the Dixie Chicks over the song Courtesy of the Red, White, & Blue.
Was the Toby Keith Dixie Chicks feud about anything else besides the song Courtesy of the Red, White, & Blue?
Toby Keith had a feud with the Dixie Chicks over the latter's comments about President George W. Bush.
What did the Dixie Chicks say about Toby Keith?
The lead singer of the Dixie Chicks, Natalie Maines, publicly stated that Courtesy of the Red, White and Blue was ignorant, and it makes country music sound ignorant.
How did Toby Keith respond to the Dixie Chicks' comments directed at him?
Toby Keith responded to Maines by pointing out that Maines did not write her music and he does.
What else did Toby Keith say about the Dixie Chicks besides pointing out that Natalie Maines does not write her music?
Toby Keith claimed his doctored photo of Maines and Saddam Hussein together was intended to express his opinion that Maines' criticism was an attempt to squelch Keith's free speech.

Question: How did the Dixie Chicks respond to that?
Self-contained rewrite: How did the Dixie Chicks respond to the follow up comments by Toby Keith?