Looks great, when I first went vegan I wanted to get a PETA shirt which was basically a billboard of statistics, so glad my mum stopped me. This makes a statement, whilst not too in your face, I'd still probably only be comfortable wearing it with an over-shirt that I can reveal if someone asks to see. But the infantile features in the animals will naturally induce sympathy. I think a captioned picture that merged into the full frontal design of the shirt would look more seamless, but many people like a small design across the chest, so no biggie.
Welcome to ze forum anyways, peeps will ask you to make an introduction post if you feel comfortable.