Things That Don't Mix
There are things in life that often don't mix. Lots of times they are things you can avoid, but sometimes you don't really have that option. You just have to deal with it.
For instance: a lot of people like creamsickles. I find the idea of citrus and milk apalling (did I spell that right??). Anyway, no big deal - I don't have to go anywhere near them. On the other hand...
Light colored carpeting, a dirt driveway, lots of rain, and a pair of chocolate labs do not mix. I don't care how much you think your Bissell Dirtlifter will take care of things, it won't. Forget about it.
Just get black carpeting. It will save your sanity in the end.