But many business models/methods have applied for patents and obtained patents, which requires skill. Simply put, you can't simply protect the rules you make. You should try to combine some hardware in these rules (the use or structure should be creative), and then apply for a patent in the field of the combination of rules and hardware, so that it will not be rejected because it is a "rule of intellectual activity."
For example, in your current example, the mode is that people and animals exchange positions, which is just a rule. You must combine hardware, such as cages, tracks, protective measures and so on.