I agree a bump takes place when the dogs never smells them. I believe it also occurs when dog come in on unwind side whirls, points and birds flush.
What do you call when a dog is working running birds and has worked them for over 50 yards, pointing, relocating, pointing etc and birds get up 20 yards in front of dogs. I had that happen several time last weekend in a real high wind. If the dogs and not been continuing to relocate we would have never seen them fly.
I use to have a pointer that was extremely difficult to break but in latter years she would bust birds on command. Worked out nice when birds in gulley or thicket and you could stay where you could shoot and she would flush them.
When I get so good that I never miss I will expect a dog that never makes a mistake. Since I am on the wrong side of the curve I will never have it happen.
I love to watch a pup become a birddog and good dogs work running birds.
If it isn't white it is not a birddog.
Lying is lying. Don't bitch about one doing it and condone another. That's called hypocrisy.