Pasha, what you said about the goose egg sounds like it was fertile, but died.today put 2 eggs of ducks (yesterday have 2 too) and used a pencil. Some eggs of the geese was unfertilized - it was in the incubator long time, but now i see - it`s unfertilized. I don`t have enough experience now and sometimes i do a mistakes - i can`t understand - maybe the egg are fertilized, of maybe not... Only after 5-10 days i can understand correct. One goose egg was "dark", but it was in the incubator too long time. I broke the shell and see - the egg are unfertilized, there are not any goose, and smelt... haha i thinked i will die )))
Today i begin to write the dates. In another eggs of the ducks (i don`t remember yet how long they are in the incubator, maybe 3 days, maybe one week) i write "X" for understand - when the eggs width the date of today will be hatch - another eggs will be hatch early, if they will not hatch (more as 35 days, i read the duck need 28 days) i will remove it from the incubator. I used the ovoscope, the eggs are fertilized, i hope i will have a nice ducks in the next month.
I don`t know why much eggs of the geese was unfertilized - maybe because my geese are too young. I have goose-boys more that goose-girls, the eggs must be fertilized. My geese begin to put the eggs when they was 9 months old. Now (today and yesterday) i dont find any eggs of the geese, but i find 1-2 eggs of the ducks. Well, i will incubate the ducks.