gads and bald pates certainly won't hurt anything, but they aren't necessary to kill ducks.... I like using greenwing tealblocks because, for one thing,I like a bit of size variety, and I love it when teal buzz the decoys....

Most puddle ducks will decoy to mallards blocks fairly well.... heck puddlers will decoy to diver decoys pretty well, but the reverse isn't necessarily true...from what I've seen divers are more decoy critical than puddlers....