One of the treatments for morning sickness consists of accommodating food cravings and aversions. Rats modified established aversions to certain foods if they observed conspecifics eating those same foods. Aversions can also be developed to odors as well as to tastes. Behavioral adjustments by conditioned taste aversions may protect animals from over-ingestion of toxic plants. Third, there are learned aversions to distinctive foods if ingestion is followed by illness. These aversions have been induced in both predator and prey species. A wide variety of species, even slugs, have developed the ability to learn food aversions. Some patients develop oral aversions and will use the tube for all feeds. Support came from Heart of a Coward, Aversions Crown and Aegaeon.