Why is every cavalry Horse in the film brown??

Its because either their all thoroubreds または the people that made the movie want spirit to stand out so the audience is focused on him and not the other horses.

I suppose it's because (like in the cavalry over here in the UK) they want all the 馬 to be as similar as possible, kinda like a uniform. Also like the person before me 発言しました または maybe they couldn't be bothered to keep colouring in the horses!

They are probably all chosen to be the same colour によって the army so they look uniform and none of them stand out. They would probably have used Spirit for something else, または maybe leading the cavalry. I was so upset when he was taken in there :(

I think it is because ベイ, 湾 is a really common colour, also the 馬 are all thoroughbreds または somthing so they would be a colour like that. In Britain if あなた see 馬 on something like that they are often the same colour. The Queen's guards 馬 at the parade are all black. Like someone else 発言しました they want Spirit to stand out too.

sorta to make them all look the same, like a uniform and of course so that Spirit can stand out and look different

Brown was the most color that was easily matched up

Because they're police 馬 and all police 馬 are meant to be brown