Some very moving images, overall a good video, but I would continue to work some on the titles.

Talking to PTers and such, we understand blanket statements like "puppy mills add to the problem". And saying they die "in their thousands" has less effect than giving something like the number of adoptable pets the HSUS had to put down last year due to lack of homes... I'd suggest just a little more clarification and specifics to help the uninitiated understand the problem.

Plus, as PTers, we are more likely to understand the dogs that are suffering in part because they were irresponsibly bred, that the greyhound was abused by illegal racers, etc... you average audience may not. So again, the images and music are very powerful, but if you are aiming it at your average pet owner, they may need more guidance to understand exactly what it is they are seeing, and why it has happened.