After hitting KFC since 2003 with the way the fast food chain slaughters its chicken, the People for the Ethical Treatment of Animals will include again in its target McDonalds.

The bone of contention is which method is the more humane way to slaughter chicken - using an electric jolt or gassing them? PETA maintains the gas causes less suffering to the fowl.

Even though KFC maintains its business even went up whenever PETA staged protests at its outlets, the fast food chain's Canada franchisees agreed in 2008 to buy their chicken supply only from poultry producers who use gas slaughter.

PETA will try to employ the same pressure tactics on McDonalds with a scheduled Monday protest at the hamburger chain's outlet in River North. The protest event will feature rock star Chrissie Hynde.

McDonald's, the target of a "McCruelty" campaign by PETA in 2000, said it has instituted major animal welfare changes since 2000. McDonald's vice president of corporate social responsibility Bob Langert pointed out the company made its own test on the gas slaughter method. Its finding was that the results were not conclusive to state the gas method is more humane compared to the electric jolt.

Meanwhile, PETA scored a major court victory as a grand jury in the U.S. issued 19 indictments for cruelty to animals on three former workers of Aviagen Turkey in West Virginia. PETA's undercover probe showed the employees stomping, kicking, throwing and killing the turkeys in a cruel ways. The PETA footage was used by the police in filing charges against workers of the turkey farm.