Animal rights activists donned chicken suits Tuesday for a protest outside a taping of the Jay Leno Show.
"PETA is asking Leno to use his influence to benefit the millions of frightened birds who end up as McNuggets," PETA officials said in a news release.
The McDonald's promotion is part of a Monopoly-related contest during a commercial break. Viewers enter the contest online.
The deal includes Leno promotions on McDonald's packaging and game boards in the restaurants.
"Leno was at one point a McDonald's crew person," Peter Sterling, the chain's vice president for marketing, told USA Today. "People love him. He has a great reputation. As people are sampling Leno, it's a great opportunity to elevate (the show and the game)."
Two years ago, PETA named The Tonight Show's Kevin Eubanks one of the World's Sexiest Vegetarians.