My sympathies. This was an enormous problem, and as a vet who saw cases of melamine poisoning, it was horrendous.
I was so amazingly pissed until the same thing happened, but with baby formula… intended for China’s domestic market. Then I just felt really sad. This is a system so broken that it’s not just sending adulterated/poisoned treats for pets in someone else’s country. The same thing happened, but for their own babies. I can’t even fathom how messed up that is.