roland i will send to 500 mile as yearlings no probs mate ,but if you have read some of my posts i dont race youngbirds ,so to 600 would send only if they were 100% .but a lot of guys would just send anyway , not me mate , if any of you guys out there can pick out one yearling NOW and win out of 500 miles , your a better dooman than me, as iv'e been asked many time how do you know if a birds a 500 miler , my answer is, when it hits that board from 500 miles simple