I need to find a reliable pet sitter to care for my older mix-breed dog in their home when I have occasional travel. He is nearly 14, weighs about 50 pounds. He's generally dog friendly, but sometimes selective. As he's older, he tends to not interact with other dogs much and is less tolerant of very energetic dogs. He typically is walked 4 times a day for all of his bathroom needs. I'm sure he could adjust to another schedule, but I would like him to get at least 2 walks a day.