PETA's VP, Dan Mathews, works closely with NYCLASS to enlist celebrities to make parroted statements against the NYC carriage horses. Most of the celebrities who have come out recently against the carriages do so in a PETA led campaign which urges PETA supporters (or the public) to support NYCLASS and NYCLASS's Intro 86A.
The two organizations are CLOSELY intertwined. The ASPCA, which co-founded NYCLASS, has backed off significantly in their involvement with NYCLASS following a complaint to the NYS Attorney General about their lobbying role.
Meanwhile, the HSUS is also tied in to NYCLASS. Wayne Pacelle of the HSUS personally congratulated NYCLASS's executive director, Allie Feldman, on NYCLASS's electoral victories (NYCLASS gave $225,000 to NYC Is Not For Sale, a SuperPAC primarily funded by Nislick and Neu and their subsidiary companies, to defeat Christine Quinn).
Here's a hint to understand the RADICAL animal rights involvement of these three organizations (PETA, HSUS, and the ASPCA) in NYCLASS... Take Feld Entertainment's RICO complaint against these guys and replace "elephants" with "carriage horses" and there you go. Organized criminal enterprise to defame the industry and defraud the public, through wire and mail fraud, money laundering, (and election-rigging) etc.