For anyone else who is interested in dying their own yarn, i've just found a UK Kool Aid website, which is actually cheaper than ebay sellers (when you consider p&p

http://www.koolaiduk.com/index.php

I will be ordering some, see what colour I can turn my hands/kitchen/dog...

Excellent! Thanks beansforyou! I'll add this to the recommended links. Post a pic of your dog when you're finished with him/her. My cat Jesse is black and white. I wonder if he'd fancy black and green?... ;) .

I ordered my Kool Aid last night, I'm so giddy I want to start NOW :lol:

I just need some cheap white/natural yarn now, any ideas?

try some opal sock yarn for starters. Anything natural will take the dye.
http://www.getknitted.com/acatalog/copy_of_Yarns.html you can get undyed sock yarn here.