by Pajarita » Thu Feb 28, 2019 11:32 am
Welcome to the forum! If they haven't stop breeding is because you are keeping them at a human light schedule instead of a strictly solar one (birds regulate their endocrine system by the amount and quality of light they receive -research avian photoperiodism, avian reproductive system and avian endocrine system) and you must be free-feeding protein food (they are super opportunistic breeders!). And I bet that is also the reason why they fought -unless the cage was too small for all of them- because budgies are super flock oriented and love being with other budgies (I have seven in a large flight cage but had a much larger flock when I had the rescues in Pa).
You need to change their diet to gloop and greens in the am and a small, measured portion of low protein seed in the pm and keep them at a strict solar schedule with full exposure to dawn and dusk. Mind you, it's not going to help you right away because we are already half-way into full breeding season right now but, if you do everything right, they will stop at the end of the summer. Just make sure they are in absolute darkness at night because the smallest amount of light sets them off. Also, if you feed seeds, make sure you are providing enough vit D3 and that they always have cuttlebone or you will end up with eggbound (and dead) birds.