Both ways are good, but stripping her clothes off the bitch, well ripping them off, could be extra punishment if she does not live where she is being punished, she can then be sent home in ripped clothes.
Ideally for punishment the bitch should be made to strip, or be stripped, she should then be positioned an secured in such a way that all punishable areas are available.
Good you agree with the later part of my comment, if the bitch as to be nude then she should start off dressed and be made to strip, or have her clothes ripped, cut off her body, wouldn't you say.