What cage is good for domestic pigeons?

Family pigeons are good for a cage with a length, width, and height.The pigeons themselves are not large. If you only consider breeding, the height does not need 1 meter at all, but if you want to breed, the cage is higher.Because the pigeons need to be stepped on when mating, the male pigeons will be on the hen when stepping on the back, and at the same time, the wings will be expanded. If there is no way to do this, the success rate of step on the back will decrease a lot, so the larger cage is still useful.of.