If you are passionate about different dogs, this particular link is going to help you out. There are lots of dog breeds exist which you may have not heard yet. The breeds differ according to their color, sizes, nature and other things. Generally dogs are known for their friendly nature but there are few dogs which are kept to detect the crimes by training them in a proper way. If you concentrate in this link you are going to find ample of dogs, some of them are kept just as a pet whereas some of the dogs are kept to fulfill different other purposes as well.
More info: doggiedrawings.net | Etsy (h/t: laughingsquid, boredpanda)