What is the problem with the Battle of Birds always opening up?

The Birds often open their mouths due to the hot weather, and it needs to dissipate heat.Generally, the bird cage is hung in a better ventilation place, and the cage cloth is covered in the evening, so as to avoid mosquito infringement.Daily feeding is mainly mixed grains, but because high temperatures will accelerate the rotten food, it is necessary to check and replace it regularly.At the same time, water should be added in time, because the water evaporates quickly, and the birds cannot be lacking.