Noah's Wish: Animal Rescue

The animal rescue organisation Noah's Wish is mobilising to send 100
volunteers to the gulf coast and rescue as many pets that have been
separated from their families.

From their website:

Noah's Wish has been extremely busy today responding to a variety of
phone calls and e-mails, in addition to gearing up to send our initial
team to Louisiana. This team will be traveling tomorrow, followed by
additional volunteers from all different parts of the United States and
Canada. We expect to have a team of at least 100 people in Louisiana
by Friday to respond to the needs of the animals affected by Hurricane
Katrina. More of our trained Volunteers will follow to provided
additional support.

http://www.noahswish.org/