This heartbroken dog has been waiting on a jetty for its lost owner every day for the last week after falling into the river from a passing boat.

The pooch, believed to be three or four years old, was seen swimming in the middle of the Chao Phraya River near Bangkok, Thailand, last Wednesday (23/10) morning.

He is said to have been riding on a ferry with his owner before being knocked off balance by a ripple and plunging into the water.

Resident Piengkamol Kerdsomsri saw the dog battling to stay afloat as it paddled over to her home, which has a wooden walkway on the edge of the river.

The kind-hearted neighbour beckoned over the pooch and pulled him to safety. He was shivering and drenched from the dirty water.

Piengkamol has been caring for him for the last week but the dog, which she has nicknamed 'Luck', still refuses to eat.

Instead, he wakes up in the morning and waits on the edge of the jetty, looking out over the water with a. sadness in his eyes and hoping that his owner will return.

Every time a boat passes by, 'Luck' bounds to the end of the pier expecting to see someone - but each time the boat passes by without stopping.

Piengkamol said the sad dog has stayed in the same position and refuses to go anywhere else.

She said: ''He fell from the boat that was riding past my house. I didn't see that but I saw him swimming towards me.

''The reason I believe he fell off the boat is because whenever he hears the boat engine, he always runs to the end of pier like he is expecting someone.

''He will be sitting at the pier every morning and will be sad in the afternoon. He denies almost everything I feed him. I just wish that he could see his owner again.''

Piengkamol said that the dog was found at around 9am and spent the rest of the day sitting by the pier and howling at boats.

She added: “That was all he did for most of the first day. He was so scared and didn’t allow anyone to touch him or eat anything until the afternoon.''

Piengkamol said it ''breaks her heart'' to see the dog being so sad but said she will adopt him as her own if the owner does not come forward.