The guys at DPR (yeah, yeah, there are a lot of gearfreak morons there, but there are people who know their stuff too) say that the 20D auto white balance is a bit weird, in particular that it buggers stuff up under ordinary incandescent light globes.
From my own tinkering, I agree. I have taken to leaving the WB on AUTO all the time
except under artifical light (for incandescent, set it to the light bulb symbol) and also under grey, cloudy skies (set it to the cloud symbol). Both of these seem, to my eye, to make a significant difference.
But with that said, I like the warm orange softness, particularly of that first shot. (Yes, she is indeed a beautiful cat!) Not all the time, of course, but for that shot, I wouldn't change it. It suits the mood, and the colour of the cat as well.
I'm surprised to see you using such low shutter speeds! I guess it's a conditioned reflex for me now to go ape the moment I see it drop below a 125th or a 60th. I'm zooming out (to let more light in - this depends on the particular lens, though) and cranking the ISO way up.
Ths is where the Canon really shines: low noise at high ISOs. I have taken to shooting at ISO 400 all the time now, and only drop back to 100 or 200 if I'm in danger of running out of shutter speed, or if I'm doing something (like a landscape) where it might be more noticable than it is with bird shots. I go up to 800 ISO anytime it's a bit gloomy, and 1600 in case of need. Even at 3200 the noise is remarkably low, though I will only shoot at 3200 if there seems to be no other way.
Neat Image -
www.neatimage.com - is a brilliant little program for removing noise. OK, it's yet more work to do for a shot, but if it's a choice between getting a blurry low-speed shot of a rare bird or a sharp one with random noise that I can get rid of using Neat Image, then that's a no-brainer. You can't get rid of motion blur or camera shake in post-processing: you
can get rid of high-ISO noise.
PS: why is the thread so wide? It's really hard to read like this.