Can I apply for a patent for pig diagnosis and treatment technology?

It is the inventor's right to apply for a patent. As long as your invention meets the requirements for applying for a patent, you can apply. You don't need any pig quality. Whether to entrust a patent agency or not depends mainly on your convenience. For example, patent application is like a lawsuit, and patent agencies are like law firms. The parties can take legal action by themselves, but they are not familiar with the law and litigation procedures, which is laborious and has a low chance of winning the case. Law firms (lawyers) are specialized in this line, and they are also familiar with the lawsuit. Ask a lawyer to help you with your lawsuit. You don't have to work hard by yourself, and the success rate is high, but the disadvantage is that you have to charge agency fees.