Pets allowed in rentals can vary depending on the landlord or property management company. Common pets that are generally allowed in rentals include cats, small dogs, birds, fish, and small rodents like hamsters or guinea pigs. However, some landlords may have restrictions on the size, breed, or number of pets allowed in the rental property. It is best to check with the landlord or property management company to determine their specific pet policies before bringing a pet into a rental property.