Fodder (chopped grass stalks) and grains fed to horses actually ferment in the animal's gut and produce alcohol, giving rise to the expression that a horse is「feeling its oats.」The「final stage of grain」is not eaten as fodder per se, but is fermentation.
　「Horses that are fed other grains instead of oats have a higher chance of getting colic. Many cases of colic are associated with starches that are not digested by the small intestine, therefore moving on to the large intestine where it can rapidly ferment」
　　[　https://equimed.com/news/health/oats-may-prevent-colic 2023-05-17　]　
　「Horses are non-ruminant herbivores of a type known as a 'hindgut fermenter.' This means that horses have only one stomach, as do humans. However, unlike humans, they also have to digest plant fiber (largely cellulose) that comes from grass and hay. Therefore, unlike ruminants, which digest fiber in plant matter by use of a multi-chambered stomach, horses use microbial fermentation in a part of the digestive system known as the cecum (or caecum) to break down the cellulose.」
　　[　https://en.wikipedia.org/wiki/Equine_nutrition 2013-11-09　]　
　HORSE FOOD, FODDER may also allude to the fact that horses naturally masturbate on average every hour and a half or so (see 馬,「chopping their stalk」), with these elements as「seeds at stalk tip, final stage」in reference to the only remaining method for human males to relieve themselves during the final stages of the infection, since no one sane would partner with the ill, or, let's hope not. Horse grass is「chopped green shafts.」
　Without a doubt, the Irish also have knowledge of their own to pass along in these trying times:「Masturbation will not spread coronavirus, especially if you wash your hands (and any sex toys) with soap and water for at least 20 seconds before and after.」Nonetheless and regrettably, unlike in dynastic China, it must be undertaken alone to truly be a preventative countermeasure but still achieve the desired result with some degree of safety.
　 　[　https://www.sexualwellbeing.ie/sexual-health/sex-and-coronavirus/ 2020-03-31　]　
　The Dutch, too have the same solution—it seems masturbation has become mainstream in the media the world over due to the coronavirus (it has always been 'the main stream' in reality, albeit covertly for most folks):
　「'Don't have sex with your partner if they have been isolated because of (suspected) coronavirus infection,' the RVIM says. 'Sex with yourself or with others at a distance is possible (think of telling erotic stories, masturbating together).'」
　　[　https://www.theguardian.com/world/2020/may/15/dutch-official-advice-to-single-people-find-a-sex-buddy-for-lockdown-coronavirus 2020-05-16　]　
　Needless to point out perhaps, but Chinese shamans from antiquity hit upon the same solution as a pandemic preventative countermeasure, honed for ultimate client satisfaction by utilizing naked females with no-longer-integrated feet as masturbatory sex buddies available for short-term rental with erotic visualization of live prepubescent female genitalia engaging in autoerotic stimulation herself, as a solution to the same problem facing us now, but in pre-Internet days.

Modern definitions (that generally disregard history) …excluding politically incorrect concepts and other meanings deemed offensive today; may list only pigeonholed definitions, euphemisms, or meaningless mnemonics)
Chinese: feed a horse with grain; horse feed
Japanese: fodder
Unihan extended: fodder, horse feed; feed horse
EDRDG: fodder