The stench from the carcasses did catch the tenants' attention - but they stayed and sued.
One tenant, Daisy Terry, told the Daily News it was so bad she had to hold her nose coming down the stairs.
The building in Brooklyn's Bushwick neighborhood was purchased last year by a company listed in court papers as Heskel. A call to Heskel Properties in Manhattan was not immediately returned.
Terry says the landlord used the dead cats to try to push out rent-stabilized tenants. In addition, stairs leading to the basement had been removed.