Hi,
There is no option for that.
You would have a view file of the product page like product / show.php and add custom PHP to fill in the breacrumb yourself:
www.samontheweb.co.uk/add-or-remove-item...a-breadcrumb-system/
Or you could also change the code in components/com_hikashop/views/product/view.html.php :
$pathway->addItem($product_name, hikashop_completeLink('product&task=show&cid='.(int)$element->product_id.'&name='.$element->alias.$category_pathway.$url_itemid));
Instead of $product_name, you could use $this->element->product_name