Excerpts:
"On Tuesday, California passed a regulation restricting retail sales of certain rat poisons, such as d-Con. Soon, only licensed, certified or county permitted application professionals will be able to use them. The restrictions don't go into effect until July 1.
"The restriction covers any rat poisons containing brodifacoum, bromadiolone, difenacoum and difethialone. They're called second-generation anticoagulant rodenticides, and though d-Con's the most prevalent brand of these products, there are many others. Animals that ingest these poisons — not just the targeted rats and mice, but also pets and wildlife — can bleed to death either from a cut or from internal hemorrhaging. And they can be poisoned even if they don't directly eat the poison.
The EPA is studying a federal ban on the poisons.