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President Bush, carrying his dog Barney, salutes airmen as he disembarks Air Force One at Andrews Air Force Base, Md., after returning from Cincinnati, Ohio, Monday, April 3, 2006. (AP Photo/Charles Dharapak)

President Bush waves as he departs TSTC Airport in Waco, Texas with his dog Barney Monday, March 29, 2004. The President spent the weekend on his ranch in nearby Crawford. (AP Photo/Gerald Herbert)

A Marine guard salutes as President Bush's dog Barney disembarks from Marine One on the South Lawn of the White House Sunday, March 14, 2004. Barney was returning from Camp David with President Bush and first lady Laura Bush. (AP Photo/Gerald Herbert)

President Bush does his best to salute while holding his dog Barney as they get off of Air Force One at Andrews Air Force Base, Md., Monday, June 25, 2001. Bush spent the afternoon in Detroit for the annual U.S. Conference of Mayors where he called on the mayors support for more faith-based initiatives. (AP Photo/Susan Walsh)

President Bush's dog Barney plays in the snow, Tuesday, Feb. 14, 2006, in the Rose Garden at the White House. The Washington area, much like the rest of the East Coast is still recovering from a large snow storm that blanketed the area over the weekend. (AP Photo/Ron Edmonds)

President Bush plays with his dogs Barney, left and Spot, on the South Grounds of the White House prior to leaving for the Central Intelligence Agency, Wednesday, Sept. 26, 2001. (AP Photo/Doug Mills)

President Bush holds his dog Barney as he prepares to board Air Force One at the Texas State Technical College Airport in Waco, Texas, Sunday, Nov. 18, 2001. Bush spent the weekend at his Crawford ranch and is headed back to Washington where he is expected to sign the aviation security bill on Monday. (AP Photo/Doug Mills)

President Bush holds up his dog, Barney, and waves his paw to members of the media during his arrival at the South Lawn of the White House in this Wednesday, Feb. 27, 2002 file photo in Washington. In the back Gary Walters, chief usher at the White House. The chief usher of the Executive Mansion, Walters is retiring after more than 30 years _ and taking with him an intimate knowledge of everyday life at 1600 Pennsylvania Ave. "We have known Gary for many years and are especially grateful for making our family feel at home," President Bush and first lady Laura Bush said in a statement Tuesday, Oct. 24, 2006. (AP Photo/Pablo Martinez Monsivais, File)

President Bush slows his pace to wait for his dog Barney as he walks to the Oval Office at the White House in Washington, Monday, Feb. 3, 2003. Bush was returning from a visit to the National Institutes of Health Vaccine Research Center in Bethesda, Md., a Washington suburb, where he promoted his plan to fight bio-terrorism. (AP Photo/J. Scott Applewhite)

President Bush, far right, holds his dog Barney as he poses for a photo with members of the 149th Infantry Military Police unit from Ft. Hood, prior to his boarding Air Force One Monday April 21, 2003 in Waco, Texas. The president is returning to Washington after spending the Easter weekend with his family at his ranch at nearby Crawford. (AP Photo/Pablo Martinez Monsivais)

President Bush points in the direction his dog, Barney, should go following his arrival on Marine One helicopter on the South Lawn of the White House Monday, May 5, 2003 in Washington. The president earlier visited Arkansas on his way back to Washington following a weekend at his Texas ranch. (AP Photo/Pablo Martinez Monsivais)

President Bush holds his dog Barney after it came into the room and frightened area children as Bush participated in the White House children's story hour, Tuesday, Dec. 17, 2002, in the Roosevelt Room of the White House in Washington. (AP Photo/Ron Edmonds)

President Bush carries his dog Barney into his pickup truck before driving back to his ranch house, after talking to the press on the ranch in Crawford, Texas on Wednesday, August 13, 2003. Bush appeared before the press with his team of economic advisors after meeting with them during his August vacation. (AP Photo/Gerald Herbert)

President Bush shows his dog Barney to the photographers before he drives back to his ranch house after a press briefing with his economic advisors on the ranch in Crawford, Texas Wednesday, Aug. 13, 2003. Behind him, partially visible, is Labor Secretary Elaine Chao. (AP Photo/Gerald Herbert)

President Bush, along with first lady, Laura Bush, and members of the Waco Midway Little League Softball World Series championship team, react as Bush accidentally drops his dog, Barney, Saturday, Aug. 30, 2003, at TSTC Airfield in Waco, Texas. Bush quickly scooped up the dog who was not injured. (AP Photo/Duane A. Laverty)

First Lady Laura Bush kicks a ball with the Bush's dog Barney on the South Lawn of the White House after she returned from her five day trip to Paris and Moscow on Thursday, Oct. 2, 2003. (AP Photo/Gerald Herbert)

In this video image released by the White House, President Bush talks to his dog Barney in the Oval Office of the White House, asking him where in the White House is Miss Beazley?. Miss Beazley is the puppy that first lady Laura Bush was given last month by her husband as a birthday gift. (AP Photo/White House)

President Bush, along with wife Laura and dog Barney, gives thumbs-up before departing the TSTC Airfield Sunday Nov. 30, 2003 in Waco, Texas. The Bushes spent the Thanksgiving holiday at their nearby Crawford, Texas ranch. (AP Photo/Duane A. Laverty)

President Bush waves as he carries his dog Barney as he leaves Air Force One with first lady Laura Bush at Texas State Technical College airport in Waco, Texas, Friday, Dec. 26, 2003. Bush and his family will spend the New Year's Days holiday at their Crawford, Texas ranch. (AP Photo/Susan Walsh)

President Bush walks with his dog Barney after returning from spending the Easter holiday at his Texas ranch on the South Lawn of the White House Monday, April 12, 2004 in Washington. Bush met with Egypt's President Hosni Mubarak earlier in the day. (AP Photo/Charles Dharapak)

President Bush, carrying his dog Barney, gives a thumbs-up after arriving at TSTC Airfield Friday, July 23, 2004, in Waco, Texas. Bush will spend a week at his nearby Crawford, Texas, ranch. (AP Photo/Duane A. Laverty)

President Bush appears with with Roland Martin on Martin's fishing show for the Outdoor Life Network, in this April 2004 photo. The episode, taped at a lake on the president's Crawford, Texas ranch, aired Aug. 6, 2004. Bush's dog, Barney, lower right, also made an cameo appearance. (AP Photo/White House via Outdoor Life Network, Eric Draper)

President Bush carries his dog Barney as he departs TSTC Airport Thursday, July 29, 2004 in Waco, Texas. Bush is leaving his Texas ranch after a weeklong working vacation. He kept a low profile while Democrats had their national convention. (AP Photo/Pablo Martinez Monsivais)

President Bush walks away with his dog Barney after answering questions following his defense meeting on his ranch Monday, Aug. 23, 2004, in Crawford, Texas. Bush denounced TV ads by outside groups attacking both John Kerry and himself on Monday and called for a halt to all such political efforts. "I think they're bad for the system," Bush said. (AP Photo/Pablo Martinez Monsivais)

President Bush's dog, Barney is seen in a Republican National Committee video presented to the delegates on the third day of the Republican National Convention on Wednesday, Sept. 1, 2004, at Madison Square Garden in New York. (AP Photo/J. Scott Applewhite)

President Bush and his dog Barney arrive at the White House on Tuesday, Nov. 2, 2004 in Washington. (AP Photo/Evan Vucci)

Member of Bush family and friends gather around to watch early poll result in the residence of the White House, from left to right, Sam Leblond, nephew, daughter Jenna, President Bush, daughter Barbara, first lady Laura Bush, President Bush's father, former President George H. W. Bush, former first lady Barbara Bush, sister Dora Koch, sister-in-law Maria and her husband Neil Bush and family friend Lois Betts Tuesday, Nov. 2, 2004. Walking out the room is their dog Barney. (AP Photo/Pablo Martinez Monsivais)

President Bush and his dog Barney arrive at the White House on Tuesday, Nov. 2, 2004 in Washington. (AP Photo/Evan Vucci)

President Bush makes his way down the steps of Air Force One with his dog, Barney, Sunday, Nov. 28, 2004, in Andrews Air Force Base, Md.(AP Photo/Lawrence Jackson)

First lady Laura Bush, holds her pet dog Barney during a visit to the Children's National Medical Center, Wednesday, Dec. 15, 2004, in Washington. The visit has been a holiday tradition for the U.S. first ladies each year starting with Mrs. Jacqueline Kennedy. (AP Photo/Manuel Balce Ceneta)

President Bush carries his dog Barney back to Air Force One after Barney wandered away at Andrews Air Force Base in Md., Sunday, Dec. 26, 2004. The Bush's will spend the New Year's holiday at their Crawford, Texas ranch. (AP Photo/Susan Walsh)

Holding his dog Barney, President Bush boards Air Force One at Andrews Air Force Base in Md., Sunday, Dec. 26, 2004. The Bush's will spend the New Year's holiday at their Crawford, Texas ranch. (AP Photo/Susan Walsh)

President Bush and his dog Barney search for their new puppy, Miss Beazley, a Scottish terrier, Thursday, Jan. 6, 2005, on the South Lawn of the White House. The puppy, a birthday gift to the first lady from President Bush, ran into the bushes during a photo opportunity to show off the new puppy. (AP Photo/Ron Edmonds)

In this photo provided by the White House, President Bush greets Israeli Prime Minister Ariel Sharon upon Sharon's arrival to the President's ranch in Crawford, Texas, Monday, April 11, 2005. The president's dog Barney looks on at left. Bush met with Sharon on Monday to offer support for his controversial Gaza pullout plan that the Israeli leader said has generated an atmosphere approaching civil war. (AP Photo/White House,Eric Draper)

President Bush steps down from Air Force One, holding his dog Barney, at Andews Air Force Base, Md., as he arrives from a visit with soldiers at Ft. Hood, Texas, Tuesday, April 12, 2005. Bush left Washington for Rome on Wednesday and after the pope's funeral flew directly to Texas for a weekend at his ranch where he met with Israeli Prime Minister Ariel Sharon Monday. (AP Photo/J. Scott Applewhite)

Texas Air National Guardsmen, Tech Sgt. Shannon Pressnall, left, and Staff Sgt. Lyle L. Hurlburt, second left, play with Barney, President Bush's dog, as Jane Hatch, a registered nurse from Galvestion, Texas, back to camera, takes their picture, Tuesday, April 26, 2005, at Ellington Field in Houston. The dog stayed at Ellington Field as the president attended a forum on Social Security in Galveston. (AP Photo/Tim Johnson)

President Bush and Karl Rove, deputy chief of staff, left, wait for Bush's dog Barney to catch up after returning to the White House. Bush was returning from speaking to a gathering of the National Association of Realtors at the Marriott Wardman Park Hotel in Washington, Friday, May 13, 2005. The audience welcomed his message on private accounts for Social Security and tax breaks for entrepreneurs and homeowners. (AP Photo/Ron Edmonds)

President Bush, holding his dog Barney, waves as he walks toward Marine One after arriving at TSTC Airfield, Tuesday, Aug. 2, 2005, in Waco, Texas. Bush is headed for his Crawford, Texas ranch. (AP Photo/Duane A. Laverty)

This Dec. 26, 2005 file photo shows President Bush and first lady, Laura, as they carry their Scottish Terriers, Barney and Miss Beazley, respectively, before departing from Waco, Texas on Marine One on their way to their ranch in Crawford. Any president-elect has to make appointments to many important offices. But Barack Obama has additional burden: although most presidents have brought a First Dog with them, his family has yet to fill that position. (AP Photo/Lawrence Jackson, FILE)

In this Dec. 26, 2006 file photo, President George W. Bush carries his dog Barney across the airport tarmac in Waco, Texas. (AP Photo/Evan Vucci, File)

President Bush's dog Barney frolics on the South Lawn of the White House in Washington, Tuesday, Feb. 6, 2007, as he waits for the president's return from a trip to Virginia. (AP Photo/Ron Edmonds)

President Bush gets a firm grip on his elusive Scottish terrier Barney as he and first lady Laura Bush walk to board Air Force One, Friday, July 5, 2002, at Andrews Air Force Base, Md. Barney sprinted across the ramp at Andrews to check out camera crews and well-wishers waiting to see the president depart for a family reunion in Kennebunkport, Maine. (AP Photo/J. Scott Applewhite)