My birds are not for racing, just for my sons and I to play with. We just want to take them out 20 miles at the most. We've been taking them out to the edge of the yard so far but when we toss them they go a short distance and land. We try to keep them flying but they just leapfrog around the yard. I want to take them out farther but am worried they will just land short. Is there a way to keep them flying without chasing them the whole way?