I thought it was the whiskas and wanted to be sure so I started researching it. This happened about 10 years ago. I could not find the old documentation even though it was all over our newspapers at the time. I am very disappointed. I did find this article which describes the problem I am speaking of.
A company was able at that time to say something was made in the States even though lets say the proteins came from China. They thought nobody would notice but two rich peoples dogs got sick and they started doing the research and found the problem. After that of course the government tested other stuff and there were recalls of many things.
I think 10 years ago it was that milk but can't swear till I find those old articles. I really hope nobody is doing this again.
http://en.wikipedia.org/wiki/Protein_adulteration_in_the_People's_Republic_of_C hina