But builders took pity on the boy and called the RSPCA and he was rescued by an officer and taken to the Shrubbery vets locally.
The cat was found on a building site in Martin Dene on 13 September and when he turned up two days running builders decided he needed help.
RSPCA inspector Vikki Dawe said: “He is extremely thin, has hardly any hair and is the ugliest but cutest looking thing! He probably should be tabby and white and long-haired, but it is hard to tell. I think he was probably just looking for food and some love.”
Inspector Dawe thinks that Barney may have been living in a house nearby as his hair loss is thought to be due to a flea allergy, which is rare in cats living outside.
Inspector Dawe said: “Barney is doing well now and is being cared for by a vet nurse, but we would like to know where he came from so anyone with any information can call us in confidence on our inspectorate appeal line – 0300123 8018.”
The RSPCA will also be looking for a new home for Barney Rubble when he is fit and well again.