Dog walkers are being urged to keep their animals safe after crews were called out three times in as many hours to reports dogs had fallen through ice.
Two managed to escape from the water, while the third had to be rescued by firefighters in Oxford on Tuesday.
Crews were called to the River Thames in Kennington at about 1300 GMT and used rope to rescue the animal.
Richard Woodward, of Oxfordshire Fire and Rescue Service, appealed to owners to keep their pets on a lead.
He said: "Often the ice seems thicker than people expect and can be very unpredictable."
None of the dogs or their owners was injured.
Mr Woodward said: "It was great to see that no-one had ventured on to the ice to attempt a rescue, which can often have fatal consequences."