A Givealittle page has been set up to help pay for Misty's treatment.
Misty was one of two cats shot recently. Richie, a domestic short-hair from Beachlands, was shot twice in the leg and once in the chest - on July 29.
The chest injury caused blood and air to leak from his lungs and put him at risk of death.
The cat needed to be given oxygen to help him breathe, intravenous fluids, pain relief and antibiotics. Furious at what happened, Manukau After Hours Veterinary Clinic (MAHVC) set up a Givealittle page to help raise funds for his surgery.
McCann said she couldn't afford Misty's $5000 surgery but would stump up the $1000 and "hope like hell" that it worked.
Misty had been in a large amount of pain recently and been to the vet - including last night - about six times.
McCann had been to the council and police, but was yet go to the SPCA. She said Misty's condition was at risk of worsening and requiring intensive medical attention.
Manukau After Hours Veterinary Clinic administrator Niki Hotter said the shootings appeared deliberate.
The vet is offering a reward to catch the shooters.