First and foremost, you need to retain an attorney immediately. It sounds like there may be issues with your case. It's not clear whether you gave consent after being bullied by the cops. The State will not likely just drop charges so you are going to have to fight.
Surely contact an attorney. An officer needs probable cause to stop you....so with that in mind, your case could end up beneficial to you.
I'm not licensed in your state, but the facts as you present them definitely do have some issues. Your admissions may or may not be enough for a conviction, but as you can see, they were definitely enough for them to charge you. Prosecutors tend to press cases and not look closely at them until and unless someone gives them good reason to. That someone would be a qualified, experienced criminal defense attorney in your area. Next time, don't make statements or admissions or give consent for anything without consulting a lawyer first. You would have been way better off letting them get the dogs.
I agree with Mr. Larsen. The metro police department just released a new batch of rookie cops and they may be prone to making mistakes. You should retain and attorney immediately.
This answer does not create an attorney-client relationship. This answer is for information only. Call me or another attorney to represent you.