I know what you meant but I'm not sure if that is possible. That is why my suggestion was a workaround. Instead of using the actual pet hotbar in that location, you turn it permanently off (if that is possible) and use the pet hotbar skills in regular hotbar, which can be macroed to that same hotbar placement you were using on the other class. Effectively you'd get the same result, except maybe for keyboard bindings if you were used to use those for the pet bar. Thinking outside of the box thing ^^