What is the reason why pigeons can't fly up

The pigeons may not fly, it may not love to fly, which has something to do with their descent and nature.If this is the case, you can consider eliminating them.Secondly, it is necessary to consider whether it is improper feeding and give them too much feed so that they can eat too much, which is also unfavorable for training their homes.To ensure that all pigeons are fed after returning, so that they can control their home flight time.