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Consider how large you want your dog walking career to be. Learn how to start a small business. Set the amount you want to charge. Print some stylish business cards. Advertise. Get a good website.
Be realistic - you'll probably need  to start small, and allow yourself time to grow. Do you want it to be a part-time or a full-time career?  How much time can you devote to dog-walking? If you are young and want to make money by dog walking, make flyers and offer around your neighborhood, or put up notices on notice boards or in shop windows. For example, consider these scenarios:  If you are a student who needs income during studies, you will have crunch times around exams and essay due dates but you will likely be fairly flexible during the rest of the time. Be honest with a potential client and explain your availability, including the possibility that there may be certain times when you will be very busy and may need to reschedule temporarily at such times. Always let them know you'll make up for it during vacation etc. If you want to start a permanent business, consider whether it is something you want to work 9 - 5 (or extended hours) 5 - 7 days a week, or is it something that only interests you part-time, say 2 - 3 days a week of a few hours here and there?  These are important considerations that will either expand or limit your options and availability.  More hours means more clients and a likelihood of referrals. Less hours will mean more devotion to a small corps of clients and a need to make it clear to them that your availability is limited to them. If you have no business past, it's more than just a good idea to take some classes and get your feet wet. Enlist the help of others that have a good grasp on the endeavor, can get you through the red tape, and form a solid business plan. If you want a large business, are you prepared to manage employees and cover a larger part of the city than you could do alone? Instead of just you, you'll be taking care of an entire team. You will need to:  Get insurance and become bonded. Interview pet sitters, check them for reliability, train them and pay them. Be able to trust them to do their dog-walking according to your instructions. Keep good financial records, manage a payroll system, pay taxes on business income, and manage other worker's requirements. Keep a tight leash (no pun intended) on the client arrangements.  As owner of the business, you should make all arrangements for dog-walking directly with clients and then provide the instructions, keys etc. to your employees. That way, if things don't work out with your dog-walker employee, you keep the client and substitute with a new employee. How you price your services will depend on the quality of your service and the length of time you have been dog-walking professionally.  It will be difficult to charge higher amounts until word-of-mouth begins to boost your business and you have solid references.  Research the field first.  What are other dog-walkers charging in your area?  Ask them if they are willing to divulge information to a potential competitor. Compete fairly with them - you could undercut slightly at first to get a toehold in the business.  Don't undercut viciously; after all, you want to stay in this industry, not be cold-shouldered by your fellow dog-walkers. If there is no one competing, then use the internet to get some idea of the costs for your region. Don't under-charge or over-charge.  Undercharging will lead some to think you are an amateur, perhaps even the local school kids looking for odd jobs.  Charge a fair amount in return for good, reliable and professional services. Make sure that they present a professional image and provide your contact details. Include a few short, pithy lines or words about what you offer as part of the dog-walking service. For instance:  Say where the dogs will be walked - for example, to the parks, on green grass, in quieter areas of the city - whatever you think dog-owners would appreciate and trust. Explain what you will do with the dogs to keep them entertained and well-exercised - for example, that you are prepared to run with the dogs for exercise, that you will play ball/tug rope/fetch with the dogs etc. The ways in which you will pay attention to nutritional and medical requirements of your canine charges. Pass around flyers or business cards to let people know about your business. Stop residents walking their dogs as you walk around, introduce yourself and offer your business card to them. Begin to network with family and friends regarding your business.  Start small and let your good business spread by word-of-mouth.  There is no harm in asking your first set of clients to refer you to their friends, colleagues, etc. If they are happy with your work, many will be happy to do this. If you've built up relationships with people from past clients (security guards, doormen, maids), they may be a potential hot bed of business, too. Bid on keywords on Google's Adwords program, and purchase paid directory listings on dog walker directories and other websites. Hit up Craigslist, Facebook, and even veterinary bulletin boards. The internet is increasingly becoming people's first port of call and aids them in their decision making. When choosing your domain name keep it simple by choosing a domain with relevant keywords (so your website appears on the first page of Google).  Consider the layout and design. First impressions count and if your website is a reflection upon your service it should depict your core values (such as friendliness and professionalism) and what you have to offer. Enhance it with images or even a video so people can get a real feel for you and your service. Consider a website that allows users to book a time slot and services online. Some customers prefer to book online rather than over the phone. If you don't know the first thing about making a website, odds are you know half a dozen people who do. So ask!