I just read this blog from PETA about why they euthanize so many animals and while it is
VERY DISTURBING (that's a warning) it is a very well written, heartfelt article that explains a lot.
There are pictures so please be aware before you look.
I am not posting this to debate any organization and I am well aware of the backlash I am sure to receive however, the article is informative and I think there will be some people here who will appreciate it as much as I did.
The PETA Files: Why We Euthanize