I don't know, I have to agree with soledad. I really don't like the idea of killing, but I mean, how else would we learn about it?? A dog? A pig? Either way, if you want to learn by veiwing it, you gotta see it. I wish there was some way not to kill them, but I mean, like soledad said its probably a stray cat or one that will die anyway..The animals are put to sleep so they feel no pain..I look at some places over population of cats, and think about it..These cats will have kittens who will have kittens etc, thats why theres so many strays right? Is it REALLY far for those kittens to grow up a stray and die some painful death by disease? Sure they don't all, but its likely too..I know that doesn't make it right, and I hope you don't think I'm all like "who cares, kill them" If I HAD the choice to say no don't kill them, I would say no for sure, but seeing its offered to me, I'm going to take it. Personally, I'm a visial learner, I need to see it and do it myself for me to learn it..I really do feel bad though, I really am kind of in the middle of things here, but I duno..I just know I'll never get the experience again..