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To the frog and pig I had to dissect in animal biology:  I deeply regret having to do what I did, if I had a choice, I would not have done it.  Just know that you did not die in vain, I will devote my life to helping animals and you have both helped me in my quest to be a veterinarian.  You are both invaluable to me for that, and I wish that there was a way that I could have saved you both, for I wish to help, not to hurt, but I know that you are both in a better place, not having to endure the hardships of this world.  I am sorry.