It’s sad to say, but ‘made in the USA’ might not be the protection that you hope. The stuff the treats were made from could have been sourced in China. And saying ‘sourced’ in the USA isn’t much help either: as long as the ingredients were bought off a dock in the US, they are, theoretically, ‘sourced’ in the USA.
Please read a consumer protection blog/site like “Truth about Pet Food” to see how little the FDA cares about pet owners! And how resistant the FDA is to letting consumers know what they are buying, and how biased!