I have a idea I just thought of:
a horse with no rider (so like its a horse that just stands there and does nothing until the player gets on it)
a elephant with no rider (same thing as the horse but is a elephant)
a camel with no rider (same thing as horse but is a camel)so kinda like decoration but the player can get on it and ride it and the animal can still die so you could make like a stable looking building and houses and stuff like that so in a castle you could put the stuff down and it would look like a real castle instead of nothing in it or towers as houses.and you could put units in houses.