i have a rat terrier....she is 4 years old........she will attack anything....coons,oppossums,deer,bobcats,,,,no lie......they are easy to train.......they have alot of grit for there size........my rat terrier has more grit sometimes than my coon hounds and beagles.......good luck......she also likes to run rabbits she does not give much mouth on the track.....give it a try.......he might turn out........