Now this is an OFF BALANCE racing pigeon. Remember its all about the bone structure to check for balance. In the picture the keel bone extends past the tips of the 2 knobby bones you feel with your finger tips up high under the wings in the pigeons chest. These are the tips of the CLAVICLE BONES. That you are feeling. This type of bird is useless for racing and for breeding.
Now if the KEEL BONE IS SHORTER,, then the tips of the CLAVICLE BONES ,then these are your speed birds that are only good for up to 7 to 10 hours of flight and then they tire out from being off balance and quit on you .I have noticed many top speed pigeons have a shorter keel then these 2 bones you feel with your finger tips.
So to check for this you hold the pigeon on one hand normally. Then turn it A HALF TURN in your hand, PUT YOUR THUMB ON THE TIP OF THE CLAVICLE BONE AND YOUR INDEX FINGER ON THE TIP OF THE KEEL.BONE IF YOU SEE THAT THEY ARE IN ALINEMENT ,AS IN ONE ABOVE THE OTHER IN A STRAIGHT LINE,,, THEN THE BIRD IS IN BALANCE FOR ANY TYPE OF RACING.ESPECIALLY LONG DISTANCE RACING.
This picture shows a bird off balance as the keel is extened,If the keel is shorter its not as bad as speed birds are shorter for the most part in my observation's over the years.