Even tho' it'll probably turn out to be more of a PITA than it's worth, she needs to report it to her supervisor and go through the process to get it checked out by a Dr through workman's comp. If nothing else, warehouses are filthy and she doesn't want the cut to get infected. Worst case, sounds like she may need a couple of stitches and a booster on her tetanus shot.
A lot of people don't know they're supposed to report minor injuries, too. Where I work, you're more likely to get fired for not reporting a work-related minor injury than for getting hurt on the job.
Some people won't report an injury because they're afraid of the random or mandatory drug test that goes with an injury report. If you tell them what supplements, natural remedies, OTC and prescription meds you're on, there generally isn't anything to worry about. I got selected for random UA a week after I received a Rx for hydrocodone, which I took during sick leave. After I returned to work, I took it when I got home and was done driving for the day. Because I drive company vehicles, I take the added precaution of advising my supervisor and HR if I've been prescribed anything like that. For as long as I have to take the medication, I either arrange my schedule to work in office or catch a ride with a coworker for in-home visits.
I was a little nervous about the UA, and everything turned out fine. Even if the hydro had turned up in the UA, they couldn't have dinged me--I had a prescription, my employer was aware of it and I'd disclosed it to the testing site.
It pays to be transparent and conscientious.
MM
"Our past is a story existing only in our minds. Look, analyze, understand, and forgive. Then, as quickly as possible, chuck it." ~ Marianne Williamson