The RSPCA is looking for information after a lurcher was found tied to a gate in Nash last month.
The dog was found in Thornborough Road, by a member of the public at noon on June 29.
The lurcher, who has been named Valerie, was collected by RSPCA inspector Kirsty Withnall and is now being cared for at the RSPCA Blackberry Farm Animal Centre, in Aylesbury.
Inspector Withnall said: “This poor dog appears to have just been dumped and left alone by whoever had previously owned her.
“It is always very sad when we discover an animal that has been abandoned.
“As a charity, we are committed to helping as many animals as possible, and any information regarding this dog would be greatly appreciated.”
Those found guilty of causing unnecessary suffering to an animal can face a maximum six-month prison sentence and/or a £20,000 fine.
Inspector Withnall added: “She is an older dog and is brindle in colour; she was in good bodily condition and was tied with a red and blue rope.
“She was not microchipped.”
Anyone with information should call the RSPCA inspector appeal line on 0300 123 8018.
To help the RSPCA investigate cases like this text HELP to 78866 to give £3 (texts costs £3 + one standard network rate message.)
Valerie should be available for rehoming at a later date. To find out more contact the centre on 0300 123 0752.