My bird is losing toenails!?

  My parakeet is very well trained and she was done and went back into her cage, then my dog came and jumped towards the cage and it fell over while i was in the shower.When i got back into the room her foot was bleeding and i put some powder on it and it has been three months and 2 of her toenails are gone! Please help!
They should grow back but it will take a while. As long as the shaft wasnt damaged. Even if they dont grow back they really can get along fine without them.