As far as the carding goes...I used carded pigeons to steady Rocky and it worked like a charm. I could reuse the pigeons, and for some reason they seemed to stay planted a lot better when they were carded, even though the cardboard wasn't keeping them down. I'm not exactly sure why that was. Must of the time they'd fly about 50 yards and land in heavy cover. I could then go catch them by hand, or send Rocky to retrieve them. When I fired blanks at the bird while it was flying, it kind of simulated a shot bird since it would hit the ground not long after I fired the shot(s).
GE has a good thing there too, but we do it a bit different. Just pull the main flight feathers off and you get the same affect. If you don't pull enough off it can fly too far. But about 3-4 on each side it will do the same thing. And then you don't have string and all that stuff to deal with. We call them sucker birds. Dogs can flush them and they fly real low for about 50-100 yards and land, with the dog right on his hinny. That gets them all jacked up and chasing well. But we do the clips first.
PS U may have to experiment on a couple to get the number of feathers down but then it is real easy and works great. too few and it can fly too far, too many and it can't fly. I can do it right now on 99% of them.
I am sure there are instances where that might be true, but I think that for the most part, "cultivating prey drive" is way overstated. If a dog doesn't naturally want birds, I'd probably just get rid of it and try again. Only one time have I seen a bird dog pup that wasn't nuts about birds. It was a 5 month old gsp and it was very timid.
All just my opinion of course...to each his own...
@ cockerfan
Instead of saying Prey Drive maybe getting the pup focused on birds? is a better statment?
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I would do clipped wings way before the bottle - I had trouble with the weight of the bottle and it gets caught in grasses, the dog points it - not ideal
http://bestgundogs.com/wp-content/uploads/ClippedWingPigeon1.jpg
http://www.guineafowl.com/fritsfarm/guineas/wings/clipping.gif
those pics give the general idea
I have also seen a pigeon with a rope tied to its legs that a handler simply holds to get the pup worked up, the bird can't fly away anywhere so it flies some and flops etc - really gets that pup going. Then you can move to clipped wings
Chuck