Hares!!! .. and skills. A dog doesnt need to have a lot of skill to run afox like it does a hare(preban)..
I have 2 dogs just under 23" mate..(both do single handed, one did it at just under 12mths, the other was over 2yrs, no bull in them) If i were you i would double your dog up with a seasoned fox hunter..Let it see and learn the ropes. Thats if it wants to, as if it doesnt there is nothing you can do... The reason people hold them back is for them to mature become of age, because once they've jacked pal, there not a lot you can do..A young dog getting a face full of fox alone,