This has been a problem in my suburban neighborhood the last couple of years. Each spring, there's a very sudden die-off among the local chipmunk population. I've found a couple of the bodies, showing classic signs of SGAR poisoning. Haven't particularly noticed an effect on the local raptor population, but I don't see all that many even in the best of times so it's hard to tell. One pet dog has died, another couple have become severely ill. The close timing and extent suggests that it's a careless pest-control contractor rather than dozens of homeowners acting independently, but no culprit has been identified yet.

These chemicals are supposed to be used for rats because many rats have developed resistance to other chemicals, but I very much doubt that rats are the problem around here. Never seen one, or signs of one. People are using these poisons to control mice, which most definitely are a problem, and it's literally overkill. Personally I burn through a handful of snap traps every year (PB and Nutella are my baits of choice). There are other effective techniques as well, several mentioned here. Like "last line of defense" antibiotics, SGARs should be a last resort for pests which can't be dealt with by other means.