Landlords responsibility for Carpet?

This is a tough one....They may be sensitive or allergic to the smell so it is your responsibility to resolve this.....Steaming a carpet is not a solution as the pee goes into the padding and cant be extracted.......As a Landlord I have learned the hard way that carpet sucks...and install quality pre finished hardwood floors and tile in my rentals...I have also pulled every inch of carpet from my own home.. Yes hardwood floors will cost you but their are attractive and a solid investment in your property...Then you never have problems like this.....Also -never allow pets.