When my parents trained up their French Brit, we worked with a Hun Wing and a Sharptail wing on a cheap flyrod with some 40lb mono... We would spend 20-30 mins 2x or so a week during the summer training the dog with the wing. Wing training was really effective. One good way to help preserve the scent is to freeze the wing between sessions.
They worked with the local Gun Dog Club a bit her first summer with pen raised quail. We only went out there a couple times, around August. Their pup was about 5mo old at that point. It was nice to do this to see how the dog would react to a gun.
Another option depending on how you feel about it... I believe the shooting preserve season in MT goes through 3/31, so you could get the pup on some birds this weekend if there is a preserve close by. I know it would be more expensive than finding pen raised pigeons, but it's an option that exists right now.
There's something to be said for the dog catching birds. While ours didn't catch any quail, she did catch a Rooster a couple years back. It was coming out of some thicker brush and she managed to grab it by the tail and knock it out of the air, she ran it down and retrieved it. That was a good day, we put 5 birds in the air and came home with 6...
One more consideration, With our French Brit, she doesn't point any birds that we have not shot over her. We trained her with hun and sharptail wings so she has always pointed them, but it took shooting (or shooting at) phesants and mtn grouse for her to associate them as birds she should point. It only took one time with each new species and she is good to go. Her first pheasant hunt I shot a year old rooster that I bumped out, she got a good smell of the bird and had 4 other solid points that day.
It's also a really good idea to snake train the dog. One of the spots we hunt in Central MT we have seen rattlers out as late as Thanksgiving

. Surprised me too... We actually ran into a 3'ish pissed off buzzworm on 11/23 a couple years ago. One last thing about snakes. Don't shoot them around the dog. For our brit, she associates anything we shoot as things she should point. It stands to reason that if we shot the snake she may start pointing them; and that sounds like bad news in my book...