You are very well informed. I almost mentioned that the Terriers are more aggressive.
Yorkies were bred in England as ‘rat catchers’ as they were small and could get into nooks, crannies and holes. The long hair may have acted as a protection for them.
My dog listens VERY well, but you are right about everything going out of his mind if he sees something to chase.
He has chased three deer clear out into the pasture. I took him out late one night and he ran into the back yard and I found him face to face with a Mastiff!!!
I walked slowly toward them and literally grabbed him up by the fur on his back, lol. Luckily the Mastiff was a friendly dog....
Dachsies and terriers are very good for tracking wounded game. They can go through the briars and brambles so very well!