hi i desperately need help.

[venom0368]

hi i made a new chicken farm but this one is automatic. so it is supposed to have like 50 chickens in it. well ive put like 75 eegs in it and none will spawn i think because of cull. please help me either get my eggs back, or spawn in the chicken i need (like 15-20) please. my more preferd way is the second way. but please help me. 

[Spyow]

To avoid large chicken farms that will lag the server, the amount of mobs confined in a space is reduced, it shouldn't have been completely emptied, but still.