This is a carryover from a WANTED thread, that might be of use to a wider audience.

For my Second Afghan War project# I struggled to find 19thC images of Afghan goats but I did discover a lithograph, by Lt. James Rattray (1818-1854), of Ghilzai Nomads in Afghanistan, painted in 1848. This extract shows a singular goat, possibly a buck of a breed that is seemingly quite small relative to the adjacent man.
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http://leadadventureforum.com/index.php?topic=89654.0
As the breed in the lithograph isn't clear to me I have decided to model mine on Anglo-Nubian herding stock, which have distinctive long, floppy ears and are normally kept hornless (being disbudded soon after birth).

The minimum height to the withers (the top of the 'shoulders') of a buck is 89cm and of a doe is 76cm.
https://en.m.wikipedia.org/wiki/Anglo-Nubian_goatAs an all plastic project, I wanted plastic goats and LAFer Sinewgrab very helpfully replied in my WANTED thread with a link to Meyer-Imports of the USA.
I bought the 3 pack bundle (18 goats) @$12.95 plus shipping to the UK (though I was able to apply a 'new customer' 10% discount):
https://www.meyer-imports.com/product_info.php/goats-sheep-set-102-2062-p-3023The goats are all in the same pose and all female (with udders). They are a soft-to-hard plastic that I think will take paint well. As it happens, they are supplied painted but I'll change the scheme for my own purposes. I shall also modify the ears to give the distinctive Anglo-Nubian appearance.
The goats are sold as being 3/4" but elsewhere in the store are described as O scale, which seems to vary from 1:48 to 1:43.5
The goats are approximately 15.5mm to the withers, which at my project's notional scale of 1/56 compared to target minimums of 15.9mm (buck) and 13.6mm (doe). They are therefore larger (but not necessarily over large) specimens.
However, this image of grazing Anglo-Nubians suggests that the model's legs are a tad too long. Taking off 1.5mm at the hoof (which could be lost in the basing medium) brings the model height down to 14mm, which if 1/56 equates to 78.4cm at 1/1.

So, the Meyer-Imports goats do provide a good starting point, but what do they look like next to the minis? In the following image, L to R as viewed, are a goat with shortened legs and with jutting ears removed, one of my (unfinished!) Afghan tribesmen (converted from a Perry plastic Zouave), and a goat as supplied:

I also have plastic goats by Pegasus* and Hornby* on the way and will compare them to the Meyer product idc.
*both of which seem to be going out of stock or out of manufacture
EDIT: corrected image formatting