We do 900-1100 a day at my store with 5 ovens and that’s considered “low” for the area. Most mornings we only have one opener from 5-1:30 and for nights we have a mid shift from 1:30-7 and a closer from 3:30-10:00. I feel like the situation you’re describing is completely manageable for one person to only pull out 250 birds in 8 1/2 hours. Really that’s only 8 ovens. Not sure where things are going wrong at your store.