Ahh, Johnny, I see you are planning on extending your range of figures. Good choice, sheep.
At one time I tried "Rounding-up" a flock of sheep to populate some of my Bachmann, and LGB, North American type stock cars.
The quantity needed for each car; double if we made the cars double deckers would have driven me into bankruptcy, unless I simply went for the Playmobile sheep...if I could have found some.
Their sheep sure as heck aren't perfect, but at least they seemed to be reasonably priced. At the time, I was led to believe I could obtain them in bag lots, but no dealers/distributors in Canada could provide them.
The only ones I could have obtained were packaged, 3 sheep and a shepherd, in each bag. If I had gone that road, I would have ended up with a grossly over-populated town of shepherds, with few sheep.
After considering having two pens at some stations, a small one for sheep, and a larger one equipped with an outhouse, a bar, and entertainment for the shepherds; I discarded the whole project.
We run our stock cars with imaginary sheep...!!
BTW; at one time LGB produced their stock cars in a green colour, lettered for the D&RGW, and the car number was followed by a "D", indicating a double deked car....but there was no second deck in the LGB car. Normally the D&RGW NG cars were painted Black, and Rio Grand Southern cars were a red colour. Often SG railroads used a lime based white paint to sterilize the bottom few feet of the sides and the floor of their stock cars. In service, straw was usually spread on the floors/decks, before loading.
