With this as my first season to store/incubate/hatch eggs, I agree that I was likely the source of most of my hatchability problems. However, when I first started looking into recommended breeder rations, my feed stated it contained 0.3% methionine, and 0.45% were recommended for meat-type breeder hens. By the end of my hatching season, the local mill had changed my former feed to 0.2% methionine. I found a different feedstore, this one keeps Purina Gamebird Startena in stock, with 0.5% methionine. I produced 16% live, healthy chicks. My recent broody hen produced 69.6%. Hurray for Mother Nature!
Angela
Good for you. Hopefully your streak will continue.
Supposedly, methionine is a common culprit when we get supplementing their feed.