Very sensitive 4yo. Great show, minus a few small issues.
Spirit Riding Free is a great show for young kids**, older kids, and adults! I've read a lot of reviews from adults complaining about this show. But most of those people don't have kids, and are just reviewing it from their point of view and how it "isn't true to the original movie". It's a new show for a new generation of children, and it's very cute.
Some of the kids are kind of mean to each other, so I am sure to just reinforce, "That doesn't seem like the nicest thing does it?" or "Goodness, she is being naughty!" I also don't like that the big girls shoo away Snips. Kids should be encouraged to include younger siblings, not be mean to them.
**There are a few episodes we skip. "Lucky and the Mysterious Map" due to a skeleton at the beginning of the episode, and it's suspenseful and spooky. "Lucky and the Harvest Hunt" is another. I've only seen the first 2 minutes due to a scary story being told and a scary pumpkin guy being shown. And we will also skip "Lucky and the Price of Freedom" until season 3 comes out and we can resolve what happens with Spirit. It's too sad at the end, but once there is a resolution, I'm sure we will watch it again without a problem. :)
Overall, it's a great show for horse lovers (like myself and my 2 girls), but there are a few scary parts in the episodes mentioned above.