This is a lot easier to tame than I thought it was! Step 1: with a dino that’s good at gathering berries, get some rock carrot seeds

(I suggest a Bigfoot or stego) step 2: plant and grow carrots (carrots work best but mejo berries will work as well) Step 3: sneak up to a horse and feed it with a carrot (or mejo berry) in the last slot of your hot bar. Step 4: Immediately mount it and repeat until tamed.

Thank you for reading! Hope it helps you fellow horse lovers!