i think i have read before about this, so i apologize if this is a duplication, my internet is not stable and i need to figure out what's up with this. i went to the coop tonight to gather eggs and under the feeder, a dead chicken. everyone was fine last night except for one or two who were sneezing. today another one or two are sneezing, but i have so many, i'm not sure if the one who died was one of the sneezers or not. what do i need to check? do i need to be concerned for my flock? we put terramycin in the water tonight, to try and head off any infections in case the others are sick and i know i can't eat the eggs when they are on this (how long after is it safe to eat the eggs?). anyway, suggestions/thoughts/etc are appreciated. she's a NH Red and was one month away from being a year old. i don't want to lose any more. help.