There was a chance Coco could lose the leg, she said.
"There's still a decision to be made as to whether they can save it or not.''
After the shooting, Mr Capstick rang neighbours to ask about anyone shooting on their properties, and Mrs Capstick said one neighbour admitted he had "shot a cat''.
"So it was deliberate. It's unbelievable he could do that.
"I know farmers shoot feral cats but anybody can see he [Coco] was a pet. You only have to look at him. He's gorgeous. He's not a wild cat.''
Mrs Capstick said Coco did not have a collar but the neighbour knew they had a Siamese cat.
She hoped police would "throw the book'' at him.
In April, the ODT reported a chocolate Burmese cat called Milo was shot in the Beacon Point Rd area. He recovered from his injuries, and an offender was not located.