The owner of an emotional support dog struck by an on-duty Nassau County police officer wants answers as medical bills continue to mount.

The 5-year-old boxer named Daisy is suffering from internal bleeding, a punctured lung, bruised ribs and a dislocated shoulder after being struck by the police SUV on Oct. 13.

Jessica Talavera says she was away on a business trip and her ex-husband was taking her daughters to school when Daisy got out and was hit.

Police say the dog was unleashed when she was struck, but Talavera says she found out the officer was going 30 mph in a 25 mph zone.

"She was going fast enough where she knocked her down a few houses down," Talavera says. "Daisy is 80 pounds."

The boxer is an emotional support dog to the mother's 12-year-old daughter Molly - who has selective mutism. She has severe anxiety and becomes nonverbal in uncomfortable situations.

Talavera says Daisy has given Molly confidence and has done everything for their family.

She says she filed a police report, and police say they are conducting an internal investigation on the officer.

Talavera says her medical bills for Daisy are close to $13,000. She was told that Nassau County refuses to pay because her dog was unleashed.

"She wasn't on the leash, but it's OK that my officer was speeding, it's OK that an on-duty police officer was speeding down on the street to hit a dog, that's OK," Talavera says. "That's the message I got from Blakeman."

Nassau County Executive Bruce Blakeman told News 12, "As a dog lover, I feel sorry for the injured dog and family, but this is a good time to remind all dog owners to keep their dogs on a leash."

The police officer who struck the dog is still on active duty.