Melamine is a common animal feed additive in China:

Melamine scrap is believed to be commonly mixed in animal feed in China to artificially boost the protein level, especially in soymeal, tricking feedlots and farmers into paying more for feed for chickens and pigs.

[..]

But an official at the Shandong Mingshui Great Chemical Group, which produces urea for fertilizer, said all of its melamine scrap was sold to companies to boost the nitrogen content in their feed products.

"They add very small amount of melamine scrap to the feed, which does not lead to mass deaths of animals. But a few here and there might react," said the manager at the Shandong feedmill, who had not heard that the product had been linked to pet deaths overseas.

"It might be another story for pets though."

According to the article, the practice is currently unregulated but the Chinese government is looking to change that. Industrialized agriculture, globalization, and free markets -- the Chinese are adapting well to capitalism. Little Fluffy is just roadkill on the highway to higher profits.