Here's the EXIF data from one of your shots...
# Exposure Time (1 / Shutter Speed) =
1/125 second = 0.008 second
# Lens F-Number/F-Stop = 50/10 =
F5
# Exposure Program = manual control (1)
# ISO Speed Ratings = 100
# Exif Version = 0221
# Original Date/Time = 2008:03:09 20:13:44
# Digitization Date/Time = 2008:03:09 20:13:44
# Components Configuration = 0x01,0x02,0x03,0x00 / YCbCr
# Shutter Speed Value (APEX) = 456510/65536
Shutter Speed (Exposure Time) = 1/125 second
# Aperture Value (APEX) = 304340/65536
Aperture = F5
# Exposure Bias (EV) = 0/3 = 0
# Metering Mode = average (1)
# Flash = Flash did not fire, compulsory flash mode
# Focal Length = 238/1 mm =
238 mm
One of the very first things I learned on here was the golden rule of shutter speed and focal length... (Thanks CT

)
Your shutter speed should always be higher than your focal length...
So with a focal length of 238mm, you should be using at least 1/300 sec. If you can't get that speed, adjust your ISO setting accordingly.
Also, when shooting animals, set focus to single centre spot, half press the shutter to focus, keep your finger there, then recompose and shoot.
Very basic stuff but you'll be surprised what a difference it makes.
HTH
Steve