Monkey brains are still eaten in Asia, as are domestic dogs. American aborigines were known to eat field mice during famines. If you desperately need food, then availability, safety, and nutritive value outweigh whether or not it tastes good. There can be no wasting of food . The idea that discomfort is not necessarily a justification for relief is likely to be tough for the pampered set to accept and adjust to during the days ahead.
Most canned goods are water-packed.
Inexpensive dehydrated foods are best, although oil-packed cans are worth counting on to some extent. During the seige of Leningrad during World War II, much human flesh was sold to the unsuspecting by this route. You don't much want to eat rat, tularemic rabbit, or other unsafe meat, either, and this is a particularly likely route for unscrupulous types to sell these materials. If a rabbit has white spots on its organs, especially the liver, you don't want to eat it. There is too much chance of it having tularemia, a disease that makes the meat unsafe to eat.