Uno is a 3-month-old Yorkipoo in Wausau, WI, who needs $2,000 for urgent liver surgery.

Uno started life in a puppy mill.

He didn't even weigh one pound when the breeder dumped the pup because he had an issue with one of his back legs.

Fetch Foster and Rescue saved Uno, who quickly went downhill.

"He became unresponsive and needed to be rushed to the animal hospital," Angel S., with the rescue, tells Waggle.

Tests revealed Uno also has a liver shunt which needs to be corrected with a CT scan and surgery to save his life.

Now the rescue is racing to raise the money the nonprofit group needs for Uno's operation.

"This little man has stolen the hearts of many," Angel says. "The veterinarians say they believe the surgery will give him a long, happy life. We want to thank you all for your generosity. We couldn't do what we do without you!"