I would let her chase,bite,chew,play what ever she want to do at this age. That way she will not be afraid and birds will be fun. When she get older you will want to put her on a lead she will find the bird and want to bump it that's OK. When that happens you'll hold her back even if you have to whirl her. When she holds you need a second person to flush and shoot the bird.Only when she holds till the bird is flush by your helper and he shoots will you let the dog go. Keep learning to small sessions so she wont shutdown on you if you put to much pressure on her it will take longer to get results. This is just one opinion. Rember to keep it short and exciting.