Hypothetically, what can an ex-landlord do to a tenant who hid a dog in a "no pet" home?

The following is hypothetical. If I were to have rented a home in Ohio near other tenants, and the lease specifically said that pets were not allowed, but my innkeeper found out I had kept a dog at the house, what can the landlord do? Assume that the lease would have concluded a few days prior to the landlord's discovery of the kept pet, and the dog did not do any damage to the house. Assume that we do not yet have our financial guarantee deposits back.

What all can the landlord do?
He can keep the deposit and right to be heard you did damage.
Well kiss that deposit good-bye. Also just because you dog did no damage doesn't be set to the landlord will not sue you for a professional cleaner to come in and they could sue for new rugs since the dog would hold been on them. Even if the carpets are perfect and the apartment is spotless they can still sue you (and win) for those services. Depends on how the lease be written, but they will probably keep all the money for cleaning. You may think the dog did not do any injury, but homes where dogs have lived smell doggie and must be cleaned!
He can preserve the deposit and charge you food deep cleaning, new rugs if he claims they smell, or new wood floors if he can show the dog scratched them also anything else he can believe of stick you with. He can sue you in small claims court. If it went to court your nouns would be tainted the second you said you lied (hid)about the dog.