i think what all the lads are trying to say is,at 20 months a terrier is no more than a good prospect and could have no way fitted enough work in to be "a real grafter" or "genuine". a lot of keen young dogs work on pure adrenalin and youthful zeal in their first season,you will find out more about the dog in his 2nd,3rd,4th season etc,imo the dog is way too young to stud,my advice would be...just work the dog ,see how he does....then in 3/4 seasons and he is still immpressing you..then stud him
yis diggory.