The cat was found hanging on a fence Saturday in the 4200 block of South Bateman Street.
Officials performed a necropsy and determined that the cat struggled before dying.
Staff from the Seattle Animal Shelter notified the cat’s owners.
Investigators are hoping that someone will come forward with information about the crime.
“Someone knows who did this,” said Animal Shelter Manager of Field Services An Graves. “We need the help of the community to find the person responsible for this disturbing and brutal act of violence.”
First degree animal cruelty is a felony punishable by up to five years in prison and/or a $10,000 fine.
“This was not only a violation of our state’s animal cruelty statutes, but a heinous and cowardly deed,” said Dan Paul, Washington State Director for The Humane Society of the United States.
The Humane Society of the United States is offering the reward for information leading to the conviction of those responsible.
Anyone with information is asked to call the Seattle Animal Shelter at 206-386-4288.