What am I doing wrong with my 7D?

I took my new 7D out this morning with the dog, used a 70-200mm, and virtually everything was OOF. Have been using a 40D without problem. Before I blame the camera, I'd like to know if I am doing something wrong. Here's a typical shot. Any advice? Thanks much!

File Name IMG_0099.CR2
Camera Model Canon EOS 7D
Firmware Firmware Version 1.0.9
Shooting Date/Time 11/03/09 09:38:41
Owner's Name
Shooting Mode Aperture-Priority AE
Tv( Shutter Speed ) 1/800
Av( Aperture Value ) 2.8
Metering Mode Spot Metering
Exposure Compensation 0
ISO Speed 200
Auto ISO Speed OFF
Lens EF70-200mm f/2.8L IS USM
Focal Length 200.0mm
Image Size 5184x3456
Image Quality RAW
Flash Off
FE lock OFF
White Balance Mode Auto
AF Mode AI Focus AF
AF area select mode Zone AF
Picture Style Standard
Sharpness 3
Contrast 0
Saturation 0
Color tone 0
Color Space sRGB
Long exposure noise reduction 0:Off
High ISO speed noise reduction 0:Standard
Highlight tone priority 0:Disable
Auto Lighting Optimizer 0:Standard
Peripheral illumination correction Enable
File Size 27533KB
Dust Delete Data No
Drive Mode High-speed continuous shooting
Live View Shooting OFF
Date/Time(UTC)
Latitude
Longitude
Altitude
Geographic coordinate system
Camera Body No. 0370301018
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