I agree, I don't like a chain fighter or a rock-chewer ... however, I disagree with culling because of it (depending on the dog).
My
Icon dog lost all his teeth by 6 months of age, and yet he would whip 99% of any dog alive his weight.
His relative
Gr Ch Zukill won 6x without a cutter in his head.
Ch Robert T Jr. stopped four 4xWs from making Grand Champion (including Indian Sonny's SDJ Cover Dog
Ch Bootlegger), also without a cutter in his head.
So I absolutely don't agree with culling dogs for this.
I think a fair assessment of the dog's performance abilities,
as an adult, should always be made before any culling decision is made.
Jack