Offer food and water, placing it on the cage bottom if the bird is weak. Never give your own medicines, antibiotics or pet store cures to your bird. These can do more harm then good. Your avian vet will prescribe appropriate and SAFE medications. Any bird in your home needs his wings trimmed unless he is an aviary bird.
Concussions often occur when birds fly into windows or mirrors.
Serious burns result from birds flopping into pots over stove flames. Wing trims can be performed at home, or you may choose to have your avian vet do it. It is best to watch an experienced person perform a wing trim before doing it yourself. This is a new feather still in its sheath. It has a prominent blood supply and will bleed if cut or broken.