[quote=@Lucius Cypher]
[@Hekazu]

Would it be possible for Orchid to grab and calm the horse for himself as his attack of opportunity? He is trained in animal handling. If not he could still just try to grapple it by dropping his javelin and going for the grab.
[/quote]
Attempting a grab is definitely possible. Attempting both that and the Animal Handling at the same time less so. That would be for his turn later.