No collars here at all. Only the two youngest are microchipped.

I used to make Allen wear one until I got Pouncer. He was the Houdini of the cat world. He'd get out of ANY collar (even a harness! ) so I admitted defeat and never put one on him. Then came Abby and Harry. Abs was such a priss that she freaked whenever I tried. Since I was only able to get two out of four to wear collars, I decided to let them all go nekkid. It felt so strange to me.... allowing my pets to go around without a collar. I felt like I was a bad mom not giving my cats any ID. I worried they'd get out and I'd lose them forever. The fear was for naught becuase they never got out. and even if they did, I feel confident we'd notice their absence immediately and find them right away.