SAN ANTONIO (AP) — Nearly 60 cats living in unsanitary conditions have been removed from a northeast San Antonio home.

Animal Care Services spokeswoman Lisa Norwood says staff conducted an hours-long investigation at the home and seized 57 cats that were living in filth.

The organization's field operations supervisor Audra Houghton says crews found large amounts of animal waste inside the house.

The San Antonio Fire Department says the property's ammonia levels tested at 64 parts per million. Houghton says normal houses should have no ammonia at all.

The San Antonio Express-News reports ( ) that a hearing Thursday will determine whether the animals will be returned to their owner.

Norwood says Animals Care Services had removed more than 50 animals from a previous home of the same owner.