While bathing 3 of the pugs the other night I desperately needed something to stop their hair from getting down the drain. I had thought to use a cheap sponge....no go. Out of desperation, I used the hair from my hairbrush and it worked better than I could have dreamed.
I didn't have a hair catcher and I fill the tub a bit so I can scrub dirty bellies/underlegs and when the water drained I switched from the plug to the hair and it worked like a charm.
So if you are ever caught without usual hair catcher and your dog decides to roll in something really stinky like mine do, you can use human hair from the brush to save your drain. Just make sure you've got enough in the brush.
If you have a helpful dog or cat tip, I wouldn't be offended in the least if you hijacked to share it.