RE: Teaching an older dog to bird hunt...
If she's OK with the gun and biddable, she should be able to flush a few pheasants for you.
Take it easy at first, and make sure that 4 or 5 shotguns don't start blazing away right over her head the first few times she flushes a bird for you. In fact, I'd hunt her when I was alone...
If you can get your hands on some pigeons, you can pull a few flight feathers and let her give chase. You can also plant a couple and let her flush 'em for you...then you shoot the pigeon.
The most important thing is to let her know she has to stay close to you in the field. Establish the boundaries early so that you can assure she'll flush birds you find within range.