It's not unusual for a bird to lose a toe, neilster, and they do just fine without them. But in this case, because the area seems inflamed or infected (the growths you mentioned) your best bet is to find a vet that specializes in birds and have it looked at. When you make the appt, don't describe the bird as 'wild' because vets sometimes won't treat wild birds--so for the appt, the bird is your 'racer'