"Disgusted" onlookers witnessed the owner of a dying dog dump the animal at a park in the Cotswolds.
The dog was suffering from a "massive" tumour on its paw when it was retrieved by a passerby near the Cotswold Water Park, in Cirencester, on Saturday morning.
Karen Cooper, 49, said she was walking her pet dogs with her partner when the injured canine was found alone.
She said that a fisherman had seen the owner of a Silver Corsa "abandon" the animal and then "drive off".
She was able to pen the dog in a nearby play park before the RSPCA arrived.
Due to its injuries, the dog was put to sleep later that day.