How do you make cheap stair treads?

Marni
by Marni
I have a funky stylish condo with 2 staircases. The unit has not a spec of carpet, just the way I like it. But the dog is having trouble with the stairs. She slips and has missed a stair or two at times. So, I'm looking for ideas on how to add some traction while keeping it stylish, inexpensive, and not a huge amount of work. Thank you!
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