hi all. i am a new chicken parent and i need some assistance. we bought 9 chicks from tractor supply mid march. took them home and have done everything we should. 3 of the chicks we got were Brahmas. in the past 3 days we have had 2 of them just up and die. i noticed today that our last brahma was looking a little twitchie and puffed up. while it was drinking water it also seemed to get choked and be throwing it back up. ive checked everyones poop and it is all normal consistency. they are fed starter feed and also have a large lot to graze for clover,grasses, and worms. ive been researching like crazy and cant find an answer. Any advice would be appreciated.