FOREST COUNTY — The U.S. Fish and Wildlife Service is offering a $1,000 reward for information that leads to the arrest of someone who is poisoning pets and wildlife in northern Wisconsin. Four dogs have died in the past month in Forest County. Testing on two of the pets, a 4-year-old yellow Labrador retriever that died April 24 and a 3-year-old German shepherd that died April 1, confirmed that they died from poisoning. Tests are pending after two more dogs died last weekend.