[Update 07/13: Anndra in the comments noted that Scots use the word beast as the genderless singular of cattle. This reminded me that there is a word that is specific to a bovine animal and is genderless and ageless: neat, as in neatfoot oil. Unfortunately, beast is of limited geographical reach, and neat is archaic, although I might try to adopt one or both into my lexicon all the same.]”
It works! I think bovine historically is an adjective (of or relating to animals in the bovinae subfamily), but just like the adjectives feline, canine, male, female, etc., bovine has evolved in usage to be a noun as well.
RebYidd23, we have changed the English language just for you.