I love those trolleys! As a horse crazy kid I used to bring the horses apples. Sometimes they ate them, with their driver's permission, but once the green apple I brought was too tart and horse spit it across the hub.Congratulations to Twilight Sparkle for turning Omnibus Orange!
Another of the Main Street Vehicles that travel between Town Square and the castle is the antique horse-drawn trolley, found at both Disneyland Park and the Magic Kingdom. The horses that pull Disneyland's trolleys live at Circle D Ranch in Norco, which is not open to the public. But you can visit the MK's horses in their off-hours at Tri-Circle D Ranch at Fort Wilderness!
The horse-drawn trolley has been at Disneyland since its Opening Day. Here's an article about Disneyland's trolley horses, with links to biographies of some. The horses are Clydesdales, Percherons, and Belgians. If you want to know who is pulling your trolley, look for the oversized Disney name badge on the trolley.
One of the exciting signs that Disneyland was set to reopen was the sight of the trolley horses out on Main Street! I'm not sure about Disneyland, but at the MK, during COVID times they have been using the trolleys for character cavalcades.
Edited to add: looking at my photos, apparently Disneyland Paris also has horse-drawn trolleys!View attachment 587945