Leachers are bred diff. Alot of folks use a with Terriers. A leacher can be grey hound cross with a collie. a grey hound cross with pit bull. Most the time its a grey hound crossed with some thing and worked with smaller dogs like Terriers. used as a muscle dog and catch critters that bolt.
The stags are sight dogs and dont bark going to the critter.
I use a stag with my Terriers as a learcher. They take a lot of heat off the little dogs!!
Vargy