Dogs live correlatively dependant on other predators in their surroundings keeping that way the balance in nature intact. The most important benefit from wild canids is retaining the food chain and eco system. Humans very often disregard this fact, since it is happening somewhere outside of the cities – in wilderness.
Despite the fact that ignorance led to bad image of dogs in wilderness, in the last couple of decades their importance to eco systems is taken more seriously. If we banish them we will destroy the eco system. In areas where coyote population was significantly reduced in artificial way, it came to "boomerang effect" and uncontrollable increase in rabbit and hare population which, subsequently, were causing much bigger damage than coyotes. One more example was provided by "National Geographic" research that showcases what happens when wolves are banished from their natural habitat and what happens when they return.
To humans, the most noticeable benefit from wild canids is the fact that they catch unwanted rodents and insects, devour carcases and other faeces.
Jackals are useful for getting rid of carcases and many pests, mostly for catching mice. Mice are the main food to foxes, they can eat 20–30 mice per meal. Besides this, they hunt rabbits too, keeping their number in wilderness stable. Grey and red fox kill rats in the cities and clean human habitats directly, while feral dogs that live on the outskirts of African villages feed on organic residue and carry out the role of cleaners.