"Puerto Rico keeps America well-stocked with vicious, oversized roosters. Breeders in the island territory, where cockfighting is legal and celebrated, cram the angry birds into crates and ship them to cities all over the U.S.
"The final destination of many of the roostergrams is unknown – cockfighters hide in a shadowy network – but smart money is on a ton of them going to Philadelphia," writes The Atlantic's John Metcalfe in a quicky clip job with a local SPCA interview and good photos here.
Not clear to me why this should be banned, instead of regulated and taxed. Fines, criminal charges and bad publicity don't seem to discourage the fans. And the authorities just kill the birds anyway, when they bust the cockfights.