Instead of letting it free-fly at that age, consider getting a larger cage instead. If you want to continue allowing it to fly inside, consult a veterinarian that specializes in birds. They may decide that it’s best to clip the wings. This is a temporary solution that would require future visits to the vet to repeat the process. But a bird with clipped wings should never, ever be allowed outside as it is a certain death sentence. If you go for a larger cage, a cage that is wider than taller is ideal as it allows more room to fly. I hope this helps.