Ok I always had outdoor cats without collars. What can I say it worked out. But I am willing to give it a try. I just don't want dangly tags on them. I tried searching on forum but it is hard. Someone mentioned embroidered or some stretchy material that worked for them. The reason I don't want tags is because they jingle and a cat outdoors sometimes needs to be able to be stealth to avoid danger. When I TNR'ed these cats the woman I got the cages from told me when she was new she had collars with bells on them for the kittens and realized the ones with the bells were all disappearing. She figured the coyotes could hear them. She lives in a more remote area than me. Anyway, I will get them microchipped and want to get the collars with maybe a pocket or ? They really have to be breakaway because I would hate to have a hung cat. My cats aren't so friendly so I doubt they would be cuddling up to anyone but who knows!