I told him I do not except pets.

I love dirty houses that reek of pet urine. 

I don't  know if I'd even raise the rent.Do they have pets? 

Basic maintenance requests completed within 5 days, emergency maintenance requests completed within 2 days, preventative maintenance work twice a year, tenant-caused maintenance billed back to tenant, periodic inspections to make sure that the tenant is reporting necessary maintenance items, late fees collected, immediate 30 day notices posted, pet fees monitored and collected, move in inspections, move out inspections, move out damages charged to tenant, advanced notice on capital repair items, 30 day move out notices communicated, pre-leasing of property, tenant stay incentives, gutters cleaned, annual rent rate analysis, turns completed in 30 days, background checks on all occupants over 18, prior landlord references, co-signers on leases, direct deposit funds, monthly summary statements, online vacancy postings, post-eviction collections...That in a nutshell is the different between managing a property and managing a property well. 

They could bring in emotional support animals and you are stuck with pets that you can't charge extra for. 

How would you feel if your tenant decided they wanted to foster monkeys and the lease forbids pets.

Does the tenant have unallowed pets?

Pets allowed?

I rent the property about at market rent, i don’t include certain utilities in the rent cost (water, electric, gas), i have laundry units and have no pet restrictions.

I have armies of paid trolls in Belarus, Macedonia, Paraguay, and the Philippines refreshing my competition's listings 24/7 while I sit at my mahogany desk petting my fluffy 40 pound cat and counting my money.