Do you love pets AND have a need for extra income? Check out dogvacay.com, rover.com, and care.com. These websites are perfect for someone who has to walk their dog anyway or for people who are not affected by an occasional hairball. You can earn $15-$50 per day for caring for or boarding animals. You can earn even more if you have the skills and patience to care for special-needs animals, such as pets with chronic conditions or age-related issues.