Even today I can go nuts without food. It doesn't take me close to drinking or bring up any cravings, but it is very uncomfortable.
A while ago a woman I knew in AA was climbing the walls so to speak. Very emotional, felt everything was going wrong. I popped round and cooked her a nice lunch. Problem dissappeared.
Especially for newly sober alcoholics, basic life disciplines and decision making skills may be badly impaired. Mine were. It took me half an hour some mornings just to decide what socks to wear. Learning how to do the simple things like cook a meal on a regular basis, took some time. Learning to think took even longer.