The acid stained Sparrow's fur and got on his face and in his eyes. Photo / Supplied
Sparrow had yellow marks all over his back and the acid appeared to get inside his mouth and into his organs, Valentina said.
She posted about the incident online and it was shared to a Facebook group where other members told her their cats had also been attacked.
She said it was heartbreaking that people could do this type of thing and the incident had been reported to police who told the Herald they were making enquiries.
Valentina said she wished people could live together in peace but said there are some people out there who did "horrific" things.
"He was in so much pain, the cry he was making was really haunting, it was just horrible," she said.