Follow your gut instincts, and go for truthiness!

Damn the science!!!!!!!! Damn the facts!!!! Damn offering accurate, non-emotional information!!!

I also second the idea of digging through their trash to find out what the dogs are fed, and reporting that to the Animal Control people as well. You should also take a photograph of the dogs every five seconds, and give Animal Control that entire inventory of photos as well. Especially if you mark them up with a red pen with date and time and ambient temperature, temperature in the crate, temperature of their water in the water dish, and air speed and direction, with arrows pointing to the dogs and any other helpful information you can think of. The more you mark them up, the more Animal Control will understand just how truly fucking oh-my-god serious this entire situation is! Animal Control will surely come and set up secret cameras and do a huge, prolonged sting operation to really nail those fucking bastards, and afterward you will be a hero! You will receive a key to the city and probably get a Congressional Medal of Honor and who knows what else! Oprah will give you a car!!

Oh, and you should go buy yourself a Ninja outfit, too, for your moment of righteous liberation!

Nothing says "Look, I'm really, really serious about this" like a Ninja outfit.