Ness you will love it, field hunting is the only way I can hunt my pup anymore she is blind as a bat but nothing wrong with her nose or ears. I had a lot of people tell me she would never hunt again when she went blind last year. They cant believe she still hunts, it is great for taking the old dogs out not near as rough on them and still keeps them doing what they love.
Yes they do fart in layouts and yes your eyes water but in all honesty being with your best friend is worth it to me.
Do a little scouting and a little door knocking and give it a whirl, you will love it.