The answers are yes, no and maybe.
Sometimes birds act like any little thing out of the ordinary will spook them. Sometimes you can be walking though the decoys and they want in, regardless. I just feel, considering the effort I have to make to get up early and set up for hunting, that hiding the dog is a better way to minimize any dog related problems which might occur than ignoring them. If your dog is small enough and your blind larger enough, you might be able to put the dog behind you, under the back rest, in your own layout blind. I have a friend who does that and it seems to work fine in hiding her and keeping her safe from gunfire.
He uses a Finisher and his BLF is probably between 60 and 70 pounds.