I bought 7 chicks home from the feed & pet store Friday. 4 are production reds & 3 oriental crested. 2 of the crested chicks have died today (Wed). Both have one side of their neck swollen. They must be just about a week or two old. They've had access to food & water (though these two didn't seem much interested in either the past day or so). It's been hot here (90s-100 in deep south Texas), so I've got them outside on my porch (in the shade all day). Any ideas what could be wrong? The swollen neck looked really weird to me, but I don't know what it means. Please help if you can. Thanks!