I agree with OldYellow, you should get involved with your local clubs as soon as possible. This way you can get to know the local fanciers so you can find out what kind of birds you need for the courses they fly locally (do you need strong, heavier birds or lighter, faster birds). See if you can get hold of your local race records for the courses your birds will be flying (the club secretary should be able to give them to you, or at least point you in the right direction). When you have the results, sort them by liberation point (where the birds were released from) and direction of flight for both old birds and young birds (i.e. east to west, north to south etc.) then work out the average speed ranges of the top 10 birds in the races on each course over the years. If the average speed for a course is, say, over 1600 yards per minute then you know that for that course you will need to enter fast pigeons to win. If you see the winners have speeds of below about 1400 yards per minute then you know that the course is tougher and will require stronger birds to cope with the harsher weather or tougher land conditions. Hope this is useful for you!