I don't take issue with The Dollar Store. In fact, I was once addicted to it, almost. I think this thread has legs.
Now, having said that, I can see how some would say "oh it's slave labor, etc." but you can always look and see where the product is made and make an informed decision. Don't be fooled. Williams-Sonoma sells some of the same stuff as Wal-Mart. I've seen shirts in the garment district in L.A. (which is a mixed bag in terms of labor rights) for three to four times more at The Gap - and I mean the exact same shirts.
I do have one Dollar Tree horror story. I don't blame Dollar Tree. I blame the manufacturer / company and Dollar Tree has taken the product off the market (I called the F.D.A. and they were useless). However, I think they pulled it, not on just on my account, but because Dollar Tree themselves either complained to the company and opted not to carry it, and/or the District Manager at the store near me after listening to my story contacted the higher ups and the chain stopped selling it.
PM me if you want the details. It was terrifying. And because of this, I would NEVER ever buy food there, and especially not for an animal. Better that I get lead poisoning than an animal. If I cannot eat it, I would never give it to an animal. This means, I will grab and handful of "Taste of The Wild" or whatever and try it, before feeding it to a dog.