Feeding wildlife can lead to cause a number of serious problems.
They do not need food from humans to survive, and that food is not healthy for them. They have specialized diets and they can become malnourished or die if fed wrong foods. Also animals cannot distinguish food from wrappers or foil and can get sick eating these items.
Increase the chances of disease transmission by gathering too many animals in one place. Also it will lead to unnecessary crowding and competition and increase the chances of having fights and injuries among animals.
Lose the natural fear of humans and can be aggressive. Once they learn that they can panhandle for food they can become a nuisance. This is a common problem in Sri Lanka as most of the people feed wild elephants on roadside cause to lead attacks and Toque Macaques has become a nuisance in most of the places because of human feeding.
Increase the chances of road accidents as they tend to stay near the road.