So our barn owner said she'd give me some free lessons in exchange for my husband making a mounting block for her. He did. He showed it to me and it's really nice. Then he's like, "I wanted to use a really dense wood so it wouldn't get messed up from the elements, so I used walnut." Now, I know walnut shavings are not good for horses. But for a mounting block, where at most the horse might occasionally scratch itself with it, would that be OK? She wanted one she could put out in the pasture (where there are horses) and I'm thinking THAT might not be a good idea, but just having it inside to be used for mounting would be OK. Thoughts? I'd hate for him to have to re-make it.