Pete Paxton is the undercover animal investigator who was featured in HBO's documentary "Dealing Dogs". He just published a book called "Rescue Dogs" which tells about his horrific finds while undercover, plus he gives tips and guidance on how to rescue a dog. We chatted on my podcast Maria's Mutts & Stuff.
Give a listen and pick up his book! Write a review on Amazon for him too! He deserves it, he's a great guy who's done amazing work to save dogs.