Gee, that's odd. Especially in view of this quote from the SF Chronicle in 2005:

DON'T BE FOOLED by the slick propaganda of PETA, People for the Ethical Treatment of Animals. The organization may claim to champion the welfare of animals, as the many photos of cute puppies and kittens on its Web site suggest. But last week, two PETA employees were charged with 31 felony counts of animal cruelty each, after authorities found them dumping the dead bodies of 18 animals they had just picked up from a North Carolina animal shelter into a Dumpster. According to the Associated Press, 13 more dead animals were found in a van registered to PETA.

or this, from Newsweek, April 28, 2008:

Since 1998 PETA has killed more than 17,000 animals, nearly 85 percent of all those it has rescued. Dalmatians may no longer be the breed of the day, but the problem of unwanted and abandoned pets is as urgent as ever. Shelters around the country kill 4 million animals every year; by some estimates, more than 80 percent of them are healthy. In recent years those grim statistics have split the animal rights community. Ironically, PETA has emerged as a strong proponent of euthanasia. (The group is better known for its public condemnations of everyone from fashion designer Donna Karan for her use of fur to the National Cancer Institute for its animal research.) In defense of its policy PETA has insisted that euthanasia is a necessary evil in a world full of unwanted pets.

or perhaps this, from PETA.org:

PETA, The American Veterinary Medical Association, and The Humane Society of the United States concur that an intravenous injection of sodium pentobarbital administered by a trained professional is the kindest, most compassionate method of euthanizing animals. The American Humane Association considers this to be the only acceptable method of euthanasia for cats and dogs in animal shelters.