I've had 8 of 15 hatch (including two that hatched this morning - day 24). I don't see anymore pips and haven't heard cheeping. Should I take the remaining eggs out, should I candle one or two to see if there's any sign of a hatch soon? Should I leave them alone for a bit longer (my husband says leave 'em in til day 28). All 15 were moving and alive at day 18.