this is NOT directed at the OP, but rather the 'picky eaters'...there is a HUGE difference between picky eating and control issues. just like refusing to clean up, wash, obey etc. kids will push limits to test parents. as parents we do the best we can and keep going. tomorrow will have a new set of challenges.
also, as for eating disorders, that is not just from being made to eat what is presented, but how a person in treated and also tends to be a control issue. if there is nothing else in life that can be controlled, eating can. it is psychological and emotional. if your child has a display of behavior that is more than not eating carrots, but ALL orange items, 'fattening' foods, poor body/self-mage, other abuse in home, etc. of course, this is something to go to a doctor with asap.
and no, a kid cannot starve themselves in two days. dehydrate, yes, starve, nuh-uh. there are kids walking around Africa who haven't eaten anything for weeks. by the way, many children there are now eating mud. yes, a fact. if they are hungry, they'll find something to eat.