The cats can be seen hiding in the bushes and farm equipment.

More than 50 feral cats have overrun a Waikato property, forcing a charity to step-in and try and get the situation under control.

As you drive up the gravel driveway at the Ohaupo property, south of Hamilton, more than 50 cats can be seen ducking and diving into the bushes.

The wild cats, many of which have untreated cat flu, have overrun the farm.

SUPPLIED 10 of the cats have been desexed by the farm's owner.

New Lives Animal Rescue has stepped in to help, but founder Donna Young is urging pet owners to desex their animals before ending up in a similar situation.

READ MORE:

* Native species at risk as population of feral cats explodes across Australia: study

* Feral cats in Marlborough should be trapped and killed, says resident

The owner of the farm has desexed 10 cats since Young's team stepped in.

SUPPLIED More than 50 wild cats have overrun an Ohaupo farm.

She said the cats weren't friendly, but would swarm over whatever food he gave them, obviously hungry.

"I think he was trying to do the right thing, but as you can imagine it gets quite overwhelming," she said.

"It's even overwhelming for me because it's resources and time that we don't have."

SUPPLIED Many of the cats have untreated cat flu.

The man, who didn't want to comment, had allowed the rescue to take three cats to rehabilitate and re-home, and Young intended on going back for more.

"I didn't just take them, I worked with him and he appeared open to letting us take some.

"There are over 50 cats there, and kittens, just everything mating with each other.

"We definitely need to lower the numbers, it's just a shame we didn't get a call when there were just three or four."

Young was alerted to the situation by a member of public.

"Wild cats have a huge impact on the community and I hate to say it, but the wildlife as well.

"In the last week I have had dozens of calls about wild cats and kittens.

"One guy rang me about a wild cat killing his chickens."

Helping the cats on the farm would be a big job, as most of the cats haven't had human interaction.

The three she currently had were timid, but had started to become more curious about people and other animals at the rescue.

Young said kitten season was never-ending.

"There's already pregnant cats around so we're expecting it.

"I don't know if kitten season even ended, it slowed down a bit but it's back."

Once the wild cats were more sociable she would be placing them in foster homes.