THREE live chickens were set alight and left to die in Kyogle St, South Lismore on Saturday.
Members of the public discovered the chickens around lunchtime and phoned emergency services.
Two of the chickens were still alive and are being cared for by Lismore Veterinary Clinic at the clinic's expense.
Lismore Clinic vet, Susan Dwyer said the two chickens that survived are eating and drinking again.
"Luckily they started eating and drinking on Saturday night and that is the best indicator we have that they may fully recover," she said.
"One chicken had all its feathers missing and a burnt wing, the other one had lost a third of its feathers but had not suffered any skin burns."
She said it was a shocking case of animal cruelty and she was surprised the two birds had survived.
"I've never seen anything like this. As well as the effects of the burns, it is surprising they survived the smoke inhalation.
"We have treated them with pain killers, antibiotics, anti-inflammatories and they have a special burn cream on."
Ms Dwyer said the chickens would need to remain in care for another week, then would be re-homed if they recovered.
One of the hens has laid an egg, but it could take some time before the feathers moult and grow back, Ms Dwyer said.
Police are appealing for information about the act.
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