I'm afraid I'd have to go against the idea of a permit, license, or anything else of that manner. A license is, at it's base, permission from the government to do something illegal(Meaning that if you don't have a license, can you own the animal? No. Why? It would be illegal). If we accept the idea of licensing, for anything, we are accepting that it is illegal. At that point, politicians can slowly make it more and more difficult to acquire the license, to the point of near or total impossibility. It's really a matter of liberty.