Dig timeout on certain domains

["Aaron O'Hara" <ajeo globalreachsoftware com>]

All,

I'm running FC1 with Bind and I'm having DNS issues.  I'm using DiG 9.2.2
and it doesn't work on domains I know to be valid:

www.futureshop.ca
www.theweathernetwork.com

When I DiG for those domains, I get the message "connection timed out; no
servers could be reached" after 12 seconds.  Most other domains will respond
within 1 or 2 seconds.

What would cause DiG not to find a domain?

Aaron