Dogs Stabbed In 'Unprovoked' Attack After Owners Let Them Off-Leash

Two dogs were seriously injured in a horrific attack in a park in Sydney's west.

NSW Police are on the hunt for a man suspected of violently attacking two pet dogs in Silverdale yesterday.

Two couples let their dogs -- a Kelpie mix and a Rhodesian Ridgeback -- off their leashes on Fowler reserve in the early afternoon.

The dogs walked down an embankment out of their owners' sight before the group heard yelping and saw the dogs returning with visible wounds on their bodies.

The couples confronted a man who has been described as bald, Caucasian in appearance, with a stocky frame and a ginger beard, briefly before they took their dogs to the vets.

Owner Chris Mills posted to a Facebook group yesterday that the attack was "unprovoked" and that the dogs "wouldn't hurt a fly".

The alleged attacker told the distraught owners their dogs "fell onto my knife", Mills claimed.

"He showed no remorse and was proud of his actions," Mills said.

Anyone with information about the incident is being urged to contact Crime Stoppers on 1800 333 000.