Confessions: Animal Hoarding

I thought this show was very revealing of people with this disorder. It became obvious many of them have depression or addictive tendencies or personality disorders. I had the impression the show helped them get treatment. This show exposed how people who want to "save" others, animals or people, aren't motivated merely by altruism. I didn't think this show was exploitive because it helped the participants, especially the family and friends who were at their wits' end. I did wonder how the producers found out about these cases and whether their shooting of the shows might have delayed some legal action...I would like to know more about how this show was produced.