It is as JW says. I had a dog that was a mix of about 4 bird dogs. I trained him to hunt fall birds and I can tell you that it is a lot of work to train a dog. Need to get him into birds as often as possible and get him excited to bark and break the birds. My dog was only 4 years old when I had to put him down due to epilepsy, his last year he did not hunt but he got me turkeys 2 of his hunting seasons. It is very rewarding when it comes together, you'll never be more proud.
Jim