I can tell you what happened. This is a direct result of "Operation Gear Grinder".
I called the authorized distributor for QV, Animal Power and Denkall here in Mexico City and the bottom line is that the owners of all (yes it's un-friggin believable - all)the Mexican vet roid makers have been indighted and are sitting in jail in the US, California I believe.
So even though the factories etc still exist, and the Mexican government has not taken any action against the companies, at least not officially that we know of, production has been halted while their lawyers try to work out a deal with the Feds. That's right - you can't even get their products here in Mexico where they are legal!
And BTW QV is fine for human consumption in my experience.