I have read a little on the Dog’s Head hammer I have seen similiar called sawyers hammers. If I remember correctly most who use them really like them for hammering in bevels on blades and such. When they are made correctly the handle and head form an angle that looks to me like it is biased for that purpose. I have not tried one though so I cannot give any advice there. What I have used a ton is a rounding hammer though. I have a 3.5 pound rounding hammer a guy in S.C. Forged for me and it is what I use for 95% of my smithing projects wether they are knives, tools, hooks or anything else. If I could only have one hammer that would be it. If you do some study from guys like Brian Brazeal on how to effectively use the rounding hammer it WILL improve your work in speed and quality. It sure did for me.