a feist is a terrier of mixed ancestry which originated in the Appalachian Mountains, they have been bred with whippets and beagles for speed and endurance and hightened sense of smell, They have no jack russel terrier in them but are very closely related to rat terriers which are also called feist by some, feist can be from 12 in to 18 in tall and weigh from 12-30 lbs, the type i have are 13 in tall and weigh near 15 lbs some have stand up ears some have fold over or button ears,these are the types, bench-legged,mt feist,kemmer feist cajun squirrel dogs ,treeing feist, Mullins feist,snoball feist, thornburg feist and denmark feists, all can be registered with NKC,UKC, and PKC and various other hunting dog organizations, these are not just squirrel dogs, they are also bear,bobcat,coon, and some have been trained on birds, my pup is a natural pointer
http://www.angelfire.com/ga3/Georgiafeist/index.html go to that link and they have a few pictures of good looking feists