Since the deadly melamine-laced dog food debacle, I won't buy any consumables for my dog that aren't made and sourced in America. And because of that instance and numerous other Made in China deadly consumer product fiascos since, I will avoid Made in China if possible -- especially where an inherently dangerous product is concerned.
Not to go off topic or anything, but dog food isn't the only malamine laced product taht you need to watch out for. A lot of milk solids are produced there and end up over here. I read an article yesterday that stated that the baby formula from the major 3 (j&j, nestle, and someone else) all contained the melamine as it used chinese solids. It went on to claim that other items made from solids like boost, etc, would also be affected.
Here's an AP article that talks about it somewhat, but not as accusitory as the one I read yesterday.
Interestingly, the FDA just now came out with guidelines for melamine that happen to be higher than what the formula makers have and you shouldn't stop spending your money.
This one is more alarmist, so I prefer it.