I'm new to raising chicks, so I'm not sure what went wrong. I got 14 Cornish X chicks from TSC a week ago. I have them in a brooder indoors, heat lamp at correct temp, wood shavings for bedding, plenty of ventilation, constant supply of fresh water. One chick dropped dead yesterday, I have no idea why. Today I notice 3 chicks are wet underneath and their crops look rather large. I'm not sure if the crops are actually enlarged or if they just appear so because the feathers are wet. After reading the thread on fermented feed, I started fermenting their unmedicated starter feed on day three (soaking feed in water and a little ACV overnight). I let the feed run out around 10pm and replenish it at 7am. I've given them a few bean sprouts (that I sprouted) and some dried meal worms as treats. These (apparently) sick chicks are pooping solid poops and moving around, however they do fall over occasionally. There's no pasty butt or other signs of illness that I have observed. Is this normal? Am I doing something wrong? Should I discontinue the fermented feed? Someone with experience, please help! Thanks in advance for your time. Here are photos of two of the chicks.