One thing that the article didn't mention is that second generation rodenticides are actually not especially dangerous to pets assuming that the owners are aware of the symptoms (usually lethargy and discolored lips). For warfarin the LD50 for cats is actually quite high - quite surprising for an animal that is vulnerable to kidney damage - and the treatment is a series of vitamin K injections. So good news for pet owners with crazy neighbors.

None of this is helpful for wild predators of course, and rodenticides are more likely to be used in rural areas where both rodents and their predators are present.