Well, 1/month is not all that recurring. 1+ a week is kinda recurring and it's hard to get lucid off anything less than that. To get lucid in a recurring dream you have to state why this event that you see so often is a dream and do that every time you hit the bed.

In your case it may look like this : " My guinea pigs are safely locked up, their cage is sturdy and they cant escape unless I let them out" You may alter this in any way you wish. Then remind yourself that every time you see your guinea pigs escaping you should perform a reality check before doing anything about the escape.