The present subject matter provides: a liftable nest, configured to serve as a preferable place for birds to lay their eggs in, and facilitate harvest of the eggs, either automatically or manually a birds feeding device, allowing feeding a flock of birds at the same time, and also allowing feeding different groups of birds, for example, males and females, in separate times, as well as with different types of food and a poultry farming system configured to facilitate egg laying by birds and control feeding of birds. Embodiments of the liftable nest, the birds feeding device and the poultry farming system are disclosed herein.
