Beau the Jack Russell was in the doghouse after becoming stranded on an island in the middle of a duck pond.
The six-year-old terrier had to be rescued by firefighters using an inflatable raft after she tried to walk on water at Abbey Park, in Leicester.
Owner Debbie Louch, of Glen Parva, said Beau became a castaway after they went for walkies in the park on Sunday morning.
"I was there with my partner, Sam Fern, and our three dogs," said Debbie.
"We had Beau and our two miniature dachshunds, three-year-old Rolo and Jenson, two."
The former care assistant said all three dogs were off the lead and running about, having fun.
"All of a sudden, Beau disappeared," said Debbie, 51. "I looked around and saw her struggling out on the island about 20 yards away from us.
"There is a lot of duck weed on the water and I think she thought it was grass and carried on running.
"Once she hit the water she looked to get out as soon as she could, and scrambled on to the island.
"Once out there, she was stuck.
"She looked so lost and forlorn it broke my heart.
"We spent nearly two hours trying to coax her back with biscuits and other treats but she wouldn't budge.
"She was shivering away, bless her, and I don't think she fancied getting colder and wetter."
Sam took his shoes and socks off and waded in up to his knees, but the water got too deep.
A city council park worker called the fire service in a bid to get Beau rescued.
Crews from Eastern, Birstall and Southern fire stations turned up, and two members of the technical rescue unit from Southern station donned dry suits and inflated their raft.
Southern crew manager Ian Cotton said: "Two of the team went on to the water.
"When they got to the island, one got off and put a lead on Beau.
"He picked her up and held her while the other paddled back to shore.
"It was nice to be able to hand her back to her owners.
"They were all very happy – especially the dog."
Sam said: "We are so grateful to the firefighters for getting Beau back to us.
"She was in the doghouse for a bit, but then we gave her a hot bath and let her sleep with the two boys on a chair in the lounge.
"We just hope this has taught her a lesson to stay on dry land in future."