Ahleha,
I'm a pet photographer in the UK. I use material that I purchased rather than specific photographic backdrops. I have white material and black material and deep blue material. I hang the material from a Lastolite background support system. I stretch the material tight by clipping it to the side poles of the support system, stretching it out onto the floor and gaffer taping it down.

The blue material gives me a lot of options. I use a Hue/Saturation adjustment layer in Photoshop and select Blue for adjusting. As, in general, dogs and cat don't have blue in them, I can just play with the sliders and only the background colour is changed. Here's an example (the bottom left hand segment shows the actual colour of the material):



More subtle colours can also be achieved easily. Hope this gives you some useable ideas.

Sally Schreiber
4 Paws Photographic