Any advise for us that are new at incubating? I have lost all but one of my eggs in the last 3-4 days? What's happening? Anyone know?
can't say...
what's happening on your end?
would need more info regarding temps, humidity, what kind of bator, temp fluctuations, shipped or local eggs, where's the icubator located? all of those things have a part in growing chicks.
actually, the FIRST question... were the eggs fertile? did you candle them? how far along were they when they quit?
temp needs to be 99.5 +/- 1 degrees.
many on here agree, dry incubating works best. ie, NO water in the incubator for the first 18 days, then increase the humidity to 55-65% or so the last 3 days.
keep it in a room that stays fairly stable temperature-wise, with no direct sunlight. vibrations can also adversely affect the eggs (kids/dogs romping in an old house can make a LOT of bounce!).
it needs adequate ventilation. if there are plugs, take them out. growing and hatching chicks need air.
shipped eggs typically suffer from being bounced around by USPS. anything over 20% is good, but you roll the dice when it comes to shipped eggs. you may get all or none or anywhere inbetween.
there's a lot to incubating eggs, that prevent answering the question 'why didn't they hatch?'. answering the checklist above might answer your own question.