Have seen this happen and how i see it you are racing old birds as they was bred in 09 so to me they are old birds if raced in 2010 the only thing that will be hard is loft flying and getting them down the road as they will hit some hawks if trained very early.
when they have been open age races in my area the young birds are all ways in front of the old birds some good cash can be won racing how you are thinking of trying
if the bird had been rung with a 09 ring and 10 ring you can race it with the old and young bird races but i not do that myself.
they was a post that they was 2010 rings on ebay.