I have never heard this. I knew a Watchdog cross that had what I called "cat teeth" - long, thin pointed canines like a cat's. She put many a dog who crossed her in their grave (accidents of course). BUT ... thick canines work too. In WSK's interview with the Mtn. Man, Mtn. Man said Zebo had canines that were "long & thick as my little finger to the second joint." That had to be pretty long & thick, considering it was a man's hand he was comparing his teeth to. Yet Zebo was a 7xw, his first 4 of which were not only kills, but quick kills. It was rumored Zebo killed Greaser as well. If that were true, it would make him a 7xw with 5 of them being kills. So thick cutters can get the job done just as well! I personally don't think a dog men of either yesteryear or today care what kind of hardware a dog has, just so long as it knows how to properly use them! Blessings ...
Thicker teeth would be less likely to break. Several dogs had this happen and this left the dog at a SERIOUS disadvantage. I've also heard of some people "sharpening" up the teeth. Not sure how likely they could get away with that. Chances are it speaks volumes for the ability of the dogs and the man.