They don't work very well. You would be better off raising them in a shed or pen to full grown then releasing later, even better in spring. School of hard knocks.
I got to spend some time on a ranch where they have been using a surragator the past two years. I was quite impressed with the results they have had. This was with quail not pheasant though.
Yep, no clue about quail. Just pheasants. I know a few who tried them on pheasants and the same result. Not good. You have to release them to young. Quail I would think you could keep them longer just by size.