The eggs will always hatch in the order they were laid. Usually after 18 days, the first fertile egg to be laid will get hatched and thereafter one egg will hatch every other day. Do not get alarmed if you see the mother pushing the chick to one side of the nestbox. This is done some times by the female parakeet. It is done to facilitate the hatching of the remaining eggs.
With the brisket prepared you need to get the smoker ready. You will want a fire of about 200 degrees F to 230 degrees F (95 degrees C. to 110 degrees C). At this temperature, you can expect the cooking time to be about 1 1/2 hours per pound.
When I smoke briskets, pork shoulders, etc, I only use time as a relative measure. You are really smoking until the internal temperature of the meat you are cooking has reached a done-temperature. I usually smoke a 12 pound brisket at 250-275 degrees F for 8 hours or so, keeping the brisket moist using a mop. When the internal temperature of the brisket reaches 190 or so, it will be done. Also, the internal temperature of a brisket will reach about 165 degrees and maintain the temperature for a while.