Show full category path

My theme does not display the full category path when sub category is selected.

For instance, if I have a sub-category named “Dogs”, which is under the parent category “Pets”. The theme will just display “Dogs”

I want to display the full path – “Pets” >> “Dogs”

I noticed that wordpress forums also display the full category path. Right now I am here at WordPress › Support » Themes and Templates

This is exactly what I want to display. Any idea how to do that ?