i beleive if you can get your ybs ranging for a couple of hours every day ,, they can go 30 miles and home ok , i knew of eddie newcombe traing his ybs 50 miles first toss,,,but they were ready for it ,,,,,,,,,,,,,the reason i say this 30 miles is when i moved to kelso , ybs got out ,singly,, returned to edin,,,,,,but i suppose the safest way is staging them,,,5 10 15 20 then a few times at this b4 going further