@Simpleterrier This would be an additional layer on TOP of pet licensing by local city / county. Every city I googled by name in Colorado already has a pet license program for cats and dogs. The craziest part is the extending it to all cage / tank critters such as invertebrates, fish, hamsters, etc. Those all tend to be colony critters and this would require a license per EACH. The pricing is also much more than municipal ones I googled.