i made an incubator from a poly box and a bed side lamp. at the start the temperature and the humidity was fine. i bought some eggs off ebay and put them in the incubator. the temperture in the incubator flucated quite a bit so i deciced to buy some 10 week old won instead but i left the incubator on with the eggs in just to see if anything would happen. on the 21th day the picked the egg up cuz i deciced to chuck the eggs away. the egg cherp and started rolling. 2 days on nothing happen. and i read on the net that they might suffocate. so i opened the egg carefully and there was a baby chick in there he was nearly formed. but his bum was all yellowly and gungy (like the yolk of the egg was attach to his bum (he had feathers and skin, apart from the bit on his bum). the chick wasnt alive. it may of been because i killed it by accidient. but i candled another egg and and about 75% of the egg is black and has a air bubble at the top. how long do u think it will take for this one to hatch it is the 22nd day 2day?