It SHOULD be possible. In fact, it will probably work more or less for the horse already - depends on the naming of the bones. The script works with bones called rFoot and lFoot and hip, if the horse has other internal names for these bones, you should adapt the names.

It won't be perfect though. Only the rear legs will be used in the calculations.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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