Sorry about that ....... I only have the kit lenses that came with the camera. EFS 18 - 55 and EF 90 - 300 4.5 - 5.6 USM. I don't use the 90 - 300 much
I have taken some 9000 shots with my 300D and sometime next year hope to get another camera maybe a 400D or 30 or 40 D.
You don't take many shots with the telephoto zoom, so it looks like you don't need anything really long.
What range of the 18-55 do you use now? All of it? Do you sometimes wish it was wider, or longer? Or would you like a faster lens that can blur backgrounds when you are shooting animals (I'm assuming these are pets unless you mean that you shoot them with the 90-300)?
Some ideas for a reasonable price:
Faster and sharper than the kit lens in the same range:
Tamron 17-50 f/2.8
Canon EF-S 17-55 f/2.8 IS USM
A little faster and longer on the long end
Sigma 17-70 f/2.8-4.5
Wider
Canon EF-S 10-22 f/3.5-4.5
Sigma 10-20
Much faster
Sigma 30 f/1.4
Canon 35 f/1.4L
Canon 50 f/1.4
Canon 85 f/1.8