Jameson is microchipped and not wearing a collar. I don't like the idea of putting a collar on him, even a safe quick release one. I feel he is better off without one. I tried putting one on once, just to see, and he started walking backwards instead of forward, almost as if he was trying to back out of it.
I personally feel he is better off without one, because A. He doesn't like collars, and B. He spends so much time hiding in shrubland and bushes, and although I KNOW a safe quick-release collar should be safe, unfortunately I don't trust them to 100%.