We have 3 dogs and 2 cats. I honestly can't tell you how many lint rollers we have!! At least a dozen, if not double that. I keep one in my car and at my desk at work, too. And two in my sewing room - a little one at my machine for un-sewn seams, and a larger one at the pressing station.
Whoever invented those things is a genius, I hope they got rich from it!