There are few animated films about horses other than the one you mentioned, Spirit, so I’ve included some television series and other similar movies that you might enjoy.
Animations Featuring Horses
- Black Beauty - There are many different animated versions of the classic novel by Anna Sewell.
- Horseland - Animated Series
- Animal Farm; - based on the George Orwell novella of the same title, this features a horse.
- Oakie’s Outback Adventures
- The Last Unicorn - Although not strictly about a horse, this film is based on Peter S. Beagle’s novel about a unicorn who finds out that she is the last one in the world.
- Barbie And The Magic Of Pegasus – Also available in 3D.
- My Little Pony: The Movie – There is also the My Little Pony TV series.
- Racing Stripes – This movie is not entirely animated, but the zebra talks and there’s a lot of CGI!
- Lucky Luke – The Ballad of the Daltons features a horse.
- Strawberry Shortcake: Horse Tales; Strawberry Shortcake: Adventures With Honey Pie Pony - these are perhaps more suitable for younger viewers, but they’re still about horses!
- Toy Story and Toy Story 3 also feature Bullseye the horse, although he’s not the central character.