in my humble and often wrong opinion, ALL stakes should also include a crippled bird, on either land or water. Or both.
(I'm not being serious, I understand it's logistically impossible).
That would tell you which dogs will pick up birds in a realistic situation. It kinda frosts me when people are griping in the gallery that their dog failed because he got a cripple. Seriously? These are hunting retrievers. I always hope for cripples. I offer big tips to the gunners to get me a cripple .
Have seen 1 live flier around here in JH tests, 2 in SH. I think it would be kinda fun to see both fliers in one series.