PETA kills any animal it "rescues" if it is deemed "unfit" for adoption. There are no specific criteria for this. In 2005, PETA killed around 97% of the dogs it "saved".
fuck off and die PETA, you're stealing the spotlight from organizations that actually do some good in the world. I said it before and I'll say it again, I will eat an animal product every time you try and stop the carnivores of the world, just to keep the market for animal products alive. it's your choice PETA, go ahead and keep doing this, your failure is delicious.