First I'd like to say I am so happy to hear your baby is doing better. I know you were thanking your lucky stars that you were able to get that collar off.
What I worry about most about not putting collars on my dogs is if they ever got out for some reason. I do have them all microchipped, but without tags no one would know unless they were kind enough to run them by the vet or animal shelter.
As a matter of fact, about 5 months ago, my husband was on his way home from work and there were two boxers standing in the middle of a busy road. They almost where hit by cars. He stopped and hollard for the boxers. Got to love them, but both came charging to the truck and jumped in like they had been there before. They had no collars and no tags. Hubby drove around in area subdivisions for hours waiting to see someone post a sign or even looking for their dogs. He ended up bringing them home. The next day I took them down to my vets office to scan for microchips...no microchip. After leaving a message with the area animal control finally we were contacted by the owner.
I actually have the chain collars only because any other collars (leather and nylon) is chewed off by the other one. One time I came home and all I found in the cage was the buckle with tags attached. They ate the whole thing. Just so I don't get blasted for using chokers I want to say they are only for tags. When we take them for walks we use the gentle leaders.