Before going any further and looking in more detail at our Good Beast Equus, the topic of classification appears to be rather a fascinating one and a potentially untapped source of hidden information. This is especially so if you take the time to study the etymology.

So we have, as drilled into my memory in Biology 12 (thank you Mr Mitchell) -
Kingdom, Phylum, Class, Order, Family, Genus, Species.
And that gives us:
Kingdom – Old English “one of the realms of nature”, which is the traditional rendering but a further look gives us Dom from old Russian and old German, and means “a dome in which individual members are gathered together”.
Phylum – Latin “race”“
Class – Latin “rank”
Order – Latin “row, arrangement”
Family – Latin “household”
Genus – Latin “birth, origin”
**Note: genus is related to genius = Latin “procreative divinity”**
Species – Latin “behold the appearance”

Interesting – Behold the appearance. Behold – “to give regard to and observe”.

Now to compare a few domesticated animals.

Cows
Cows are classified similar to the horse down to the Infra-class level of Eutheria, so they are also a Good Beast.
Then we have:
Order – Artiodactyla = Greek “even toe”
Family – Bovidae = Latin “cattle having cloven feet”
Subfamily – Bovinae = Latin “ox”
Genus – Bos = Latin “cow”
Species – Bos primigenius = Latin “cow, first born, original, foremost and best”
The common species name is Bos taurus = Latin “cow, bull”. I’m not so sure the common name tells us something as hidden and meaningful as bos primigenius!

Sheep
Sheep, also a Good Beast, are classified similar to cows down to the Order level of Artiodactyla, having an “even toe”, and Family, “cattle having cloven feet”.
Then we have:
Subfamily – Caprinae = Latin “caper, like a goat” (ah… capricorn … )
Genus – Ovis = Latin “sheep”
Species – Ovis aries = Latin “sheep, ram”

Dogs
Dogs are also one of the Good Beasts, but then their classification takes on a sinister turn!
Order – Carnivora = Latin “flesh devourer”
Family – Canidae = Latin “family of wolves, jackals, foxes, coyotes and dogs”
Genus – Canis = Latin “wild dogs”
Species – Canis lupus = Latin “wolf”
Also known as Canis lupus familiaris = which takes a wild wolf and makes her part of the “family”.

Cats
As one might suspect, cats are also one of the Good Beasts, and a wily flesh devourers.
Family – Felidae = Latin “family of cats from lion to domesticated”
Genus – Felis = Latin – “small cats” who are unable to roar due to ossification of the hyoid bone
Species = Felus catus – Latin “small cat”.
Also known as Felis catus domestica = which takes a small cat, who can’t roar, and makes you think she has been “tamed”.

I can’t promise I won’t do any more clarifications but you have to admit, it’s actually rather interesting to look at the inner meaning of words, even if this is by no means extensive. By looking at word origins and meanings, as opposed to looking only at physical characteristics, there is still much to be uncovered. The words seem to suggest that at the level of Genus, a "Procreative Divinity" is at work.

Behold, the appearance of the Genus.

But now, so many questions.

What then makes the cow, the Original First Born and the Best.
Why is a sheep, seemingly just a sheep? Or more precisely, where can I find an etymology source that goes a little bit deeper?
Why is a dog part of the family, but a cat is only tamed?
And what in the world went wrong with the horse. The Good Beast who somehow went from Equus Ferus, the Wild Horse, to Equus Ferus Caballus.
Not part of the family. Not tamed. But Caballus – a “pack-horse, a nag, a hack. A broken down horse” … surely not?