From the MSNBC story:
The Drug Enforcement Administration arrested 22 Colombian nationals for smuggling heroin into the United States via various methods, including surgically implanting the drug into puppies, officials said Wednesday.
The Colombian organization brought more than 20 kilograms of heroin into the United States, concealing some of it by slitting open purebred puppies, according to John P. Gilbride, the DEA's New York Field Division special agent-in-charge, in a news release.
At least three puppies died from having liquid heroin packets placed inside them and then being stitched back up, DEA spokesman David Ausiello said.
Just reading about it and seeing some of the pictures makes my stomach turn.