1000 hens bought by a man in an online auction for $1.50 are now parasite free and ready to be rehomed (file image).

A flock of 1000 hens that was bought in an online auction for $1.50 but later found to be plagued with parasites are now ready to be rehomed.

The hens, from a West Auckland egg farm that was closing down, were accidently bought online by Hamilton man Steve Morrow for $1.50.

Morrow thought he was buying only one hen but got more than he bargained for when he was told he was the proud owner of 1000 birds.

He put out a desperate social media post for help in rehoming the hens but the birds were found to be infested with parasites and needed immediate treatment.

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Animal Sanctuary said a "caring farmer" took them all in and treated the birds.

Richard Rennie/Stuff The hens are from an egg farm in West Auckland that is closing down (file image).

The birds, after being inspected by a vet, were found to have lice, mites and tapeworms.

A vet report sighted by Stuff showed some birds were developing ulcers and most were underweight.

But after treatment and a lot of nutritious food, the birds were ready to be rehomed again, Animal Sanctuary owner Shawn Bishop said.

"All 1000 birds will be saved, it is a happy ending," Bishop said.

"That is the main thing – the hens have been treated, they are being well fed and they're looking so much healthier now."

"Great homes" were now being sought and there were adoption centres set up all around Auckland, Bishop said.

"We have been receiving so many calls, there's been such a great response."

She said she was considering pulling a social media post she put up on their page on Monday morning because they had been inundated with calls from people eager to adopt the hens.

Some of the hens will be rehomed to locations in Cambridge, Rotorua, Hamilton and North of Auckland.

Bishop said they were accepting donations to help pay for the treatment, and for the food and care for the birds while they were waiting to be rehomed.

"They will be going all over. Others will be fostered out while we look for new homes for them. It is a very good happy ending."