MagSh

Please help .... I have 9 budgies... 4 females and 3 males. I have placed 4 nests of same size on same height... And one additional bigger nest on the floor (had a spare one so placed it in the cage) But female budgies keep fighting for eachother nests... They lay eggs frequently and next day the eggs are on the floor with another hen sitting in the nest... After sometime the first hen resumes her nest back but the eggs are already smashed on the floor... And i have seen the males play with the remains of the egg.... I am not a professional breeder... just kept budgies as pets only.... but i want them to thrive and have chicks... What should i do.... Please help