That the dogs did not respond when called, as stated by the magistrate, simply means that Cruella has absolutely no control over her hounds. Which was the pretty much the point of the case being put forward.

A friend sent me this:
http://www.slate.com/articles/life/heavy_petting/2012/01/animal_rescue_want_to_adopt_a_dog_or_cat_prepare_for_an_inquisition_.html

I thought this paragraph interesting:

Being an animal rescuer can be a potent source of identity, combining salvation and self-sacrifice. But in recent years the ASPCA has seen that, for some people, this identity crosses over into pathology. Dr. Randall Lockwood, a senior vice president of the ASPCA, says that around 25 percent of the 6,000 animal hoarding cases reported in the United States each year involve purported rescuers, up from less than five percent 20 years ago.