Hi, She hatched some eggs last year, so definitely knows how. She has been on the eggs for 30 days, maybe 31. I was able to look under her the other night as there was a bad smell. All of the eggs were intact, the smell came from something else in the hay that was probably there before she sat. She's very persistent and rarely gets up for water or anything. Do turkeys ever go past the 28 days or is this a sign they are not viable? She was bred many times by our toms.