Pet Walker - Full-time / Part-time

I have a Morkie and a Yorkie. Both close to 4 years of age. They are housebroken, however I currently have pee pads in the house as well, which they know to use when they need to( I typically don't let them out when it's dark outside thus the pads). So this would be a must requirement. They are rather small so I would prefer a sitter with no other pets.