If you have found a wild animal that has obvious injuries or illness:

Do not give food or water as this can be harmful to the animal. If you are able to do so safely, contain the animal and keep it in a warm, dark, quiet place away from people and pets.

Don't be a kidnapper: finding a young animal alone does not necessarily mean it needs "help" from a human. Wild babies are sometimes left alone while their parent(s) look for food.