Incubator hatches are tough. They need constant high 90's temps in a brooder, and tiny feeds every hour round the clock for the first few days, then you can stretch to it 90 minutes overnight. Formula needs to be super thin, and if you accidently over-feed, the crop stretches and stops digesting food, causing yeast overgrowth and starvation though looking "full". I just did 2 day one Linnies and like I say every 5 years or so when the memory of how hard it is fades, "I am never doing that again!" I foolishly forget and repeat intervening lol.