Didn't notice you saying anything about the whistle. If you are not using, or have not used it yet, you would be well served to start incorporating tbe whistle into your 'sit' and 'here' commands now. Makes for much easier transition to the remote sit when time to begin the handling/T work. Treats used on the "here" whistle command (and the 'sit', of course) work well and have no adverse effect on the dog as you phase them out.
As far as live birds go, they are important for exposing the pup to picking up something live with feathers, getting a pup exited that doesn't have great drive, giving a dog a change of routine, but it's not necessary for a young dog to have a steady diet of birds while you are establishing their foundations at this early age. Some pups have a tendency to turn off bumpers and lose interest when provided with the constant use of real birds. (My opinion of course, others may disagree) You can get complete desired results from your artificial training tools, with occasional use of live birds.
Good luck! Looks as though you are well on your way. Evan provides good direction.