The toddler inadvertently jumped on the border collie, who was sleeping, and was bitten around 1:30 p.m., Police Chief Thomas Shine said.
She also sustained a puncture wound on her right arm, the chief said.
She was in stable condition at Hackensack University Medical Center and may require surgery, he said.
Detective Robert Wacht was investigating.
Click here to follow Daily Voice Lakewood and receive free news updates.